Russian missiles pounded a military base in western Ukraine on Sunday, killing 35 people in an attack on a facility that served as a crucial hub for cooperation between Ukraine and the NATO countries supporting its defense. The barrage marked an escalation of Moscow’s offensive and moved the fighting perilously close to the Polish border. The attack so near a NATO member-country raised the possibility that the alliance could be drawn into the fight, and was heavy with symbolism in a conflict that has revived old Cold War rivalries and threatened to rewrite the current global security order. More than 30 Russian cruise missiles targeted the sprawling facility at Yavoriv, which has long been used to train Ukrainian soldiers, often with instructors from the United States and other countries in the Western alliance. Poland is also a transit route for Western military aid to Ukraine, and the strikes followed Moscow’s threats to target those shipments. Ukrainian President Volodymyr Zelenskyy called it a “black day,” and again urged NATO leaders to establish a no-fly zone over the country, a plea that the West has said could escalate the war to a nuclear confrontation. “If you do not close our sky, it is only a matter of time before Russian missiles fall on your territory. NATO territory. On the homes of citizens of NATO countries,” Zelenskyy said. Read:U.S. journalist killed by attack near Kyiv In addition to the fatalities, the Ukrainian Defense Ministry said that 134 people were wounded in the attack. Ina Padi, a 40-year-old Ukrainian who crossed the border with her family, was taking shelter at a fire station in Wielkie Oczy, Poland, when she was awakened by blasts Sunday morning that made the glass in the windows shake. “I understood in that moment, even if we are free of it, (the war) is still coming after us,” she said. Since their invasion more than two weeks ago, Russian forces have struggled in their advance across Ukraine, in the face of stiffer than expected resistance, bolstered by Western weapons support. Instead, Russian forces have besieged several cities and pummeled them with strikes, hitting two dozen medical facilities and leading to a series of humanitarian crises. The U.N. has recorded at least 596 civilian deaths, though it believes the true toll is much higher, and Ukraine’s Prosecutor General’s office said that at least 85 children are among them. An American filmmaker and journalist was also killed Sunday. Millions more people have fled their homes amid the largest land conflict in Europe since World War II. Talks for a broad cease-fire have so far failed, but the Kremlin’s spokesman said another round would take place on Monday by videolink, according to Russian state news agency Tass. Meanwhile, U.S. President Joe Biden is sending his national security adviser to Rome to meet with a Chinese official. There are worries in Washington that Beijing is amplifying Russian disinformation and may help Moscow evade punishing Western economic sanctions. Zelenskyy said he will continue negotiating with Russia and making requests for a meeting with Putin, which, so far, have gone unanswered by the Kremlin. “Our delegation has a clear task – to do everything to ensure a meeting of the presidents,” Zelenskyy said in a nightly address to the nation. Zelenskyy said daily talks between the two countries via video conference are necessary to establish a cease-fire and add more humanitarian corridors, which saved more than 130,000 people in six days. The attacked training base near Yavoriv is less than 25 kilometers (15 miles) from the Polish border and appears to be the westernmost target struck during Russia’s 18-day invasion. The base has hosted NATO drills, and a senior official, Admiral Rob Bauer, previously hailed it as embodying “the spirit of military cooperation” between Ukraine and international forces. As such, the site is a potent symbol of Russia’s longstanding concerns that the expansion in recent years of the 30-member Western military alliance to include former Soviet states threatens its security — something NATO denies. Still, the perceived threat from NATO is central to Moscow’s justifications for the war, and it has has demanded Ukraine drop its ambitions to join the alliance. Lviv governor Maksym Kozytskyi said most Russian missiles fired Sunday “were shot down because the air defense system worked.” Those that got through killed at least 35 people and wounded 134, he said.

Waves of Russian missiles pounded a military training base close to Ukraine’s western border with NATO member Poland, killing 35 people. The strike followed Russian threats to target foreign weapon shipments that are helping Ukrainian fighters defend their country against Russia's grinding invasion. More than 30 Russian cruise missiles targeted the sprawling training facility that is less than 25 kilometers (15 miles) from the closest border point with Poland, according to the governor of Ukraine’s western Lviv region. Poland is a key location for routing Western military aid to Ukraine. Since Russia invaded Ukraine, Lviv had largely been spared the scale of destruction unfolding further east and become a destination for residents escaping bombarded cities and for many of the nearly 2.6 million refugees who have fled the country. The training center in Yavoriv appears to be the most westward target struck so far in the 18-day invasion. The facility, also known as the International Peacekeeping and Security Center, has long been used to train Ukrainian military personnel, often with instructors from the United States and other NATO countries. It has also hosted international NATO drills. As such, the site symbolizes what has long been a Russian complaint: That the NATO alliance of 30 member countries is moving ever closer to Russia’s borders. Russian has demanded that Ukraine drop its ambitions to join NATO. Lviv governor Maksym Kozytskyi said most of the missiles fired Sunday “were shot down because the air defense system worked.” The ones that got through through killed at least 35 people and wounded 134, he said. Russian fighters also fired at the airport in the western city of Ivano-Frankivsk, which is less than 150 kilometers (94 miles) north of Romania and 250 kilometers (155 miles) from Hungary, countries that also are NATO allies. The airport, which includes a military airfield as well as a runway for civilian flights, also was targeted Friday. Read:Russians strike near Kyiv, block aid convoy; port city reels Fighting also raged in multiple areas of the country overnight. Ukrainian authorities said Russian airstrikes on a monastery and a children's resort in the eastern Donetsk region hit spots where monks and refugees were sheltering, wounding 32 people. Another airstrike hit a westward-bound train evacuating people from the east, killing one person and injuring another, Donetsk's chief regional administrator said. To the north, in the city of Chernihiv, one person was killed and another injured in a Russian airstrike that destroyed a residential block, emergency services said. Around the capital, Kyiv, a major political and strategic target for the invasion, fighting also intensified, with overnight shelling in the northwestern suburbs and a missile strike Sunday that destroyed a warehouse to the east. In Irpin, a suburb about 12 miles (20 kilometers) northwest of central Kyiv, bodies lay out in the open Saturday on streets and in a park. “When I woke up in the morning, everything was covered in smoke, everything was dark. We don’t know who is shooting and where,” resident Serhy Protsenko said as he walked through his neighborhood. Explosions sounded in the distance. “We don’t have any radio or information.” Chief regional administrator Oleksiy Kuleba said Russian forces appeared to be trying to blockade and paralyze the capital with day and night shelling of the suburbs. Kuleba said Russian agents were in the capital and its suburbs, marking out possible future targets. He vowed that any all-out assault would meet stiff resistance, saying: “We’re getting ready to defend Kyiv, and we’re prepared to fight for ourselves.” Talks aimed at reaching a cease-fire again failed Saturday, and the U.S. announced plans to provide another $200 million to Ukraine for weapons. Russian Deputy Foreign Minister Sergei Ryabkov warned other nations that sending equipment to bolster Ukraine's military was "an action that makes those convoys legitimate targets.” Read:Russia-Ukraine war: Key things to know about the conflict Russian soldiers pillaged a humanitarian convoy that was trying to reach the battered and encircled port city of Mariupol, where more than 1,500 people have died, a Ukrainian official said. Ukraine’s military said Russian forces captured Mariupol’s eastern outskirts, tightening their siege of the strategic port. Taking Mariupol and other ports on the Azov Sea could allow Russia to establish a land corridor to Crimea, which it seized from Ukraine in 2014. Ukrainian President Volodymyr Zelenskyy accused Russia of trying to break his country apart, as well as starting “a new stage of terror” with the alleged detention of a mayor from a city west of Mariupol. “Ukraine will stand this test. We need time and strength to break the war machine that has come to our land,” Zelenskyy said during his nightly address to the nation Saturday. Zelenskyy reported that 1,300 Ukrainian soldiers had died since the Russian invasion began Feb. 24. The first major city to fall, earlier this month, was Kherson, a vital Black Sea port of 290,000 residents. Zelenskyy said Saturday that Russians were using blackmail and bribery in an attempt to force local officials to form a “pseudo-republic” in the southern Kherson region, much like those in Donetsk and Luhansk, two eastern regions where pro-Russian separatists began fighting Ukrainian forces in 2014. One of the pretexts Russia used to invade was that it had to protect the separatist regions. Zelenskyy again deplored NATO’s refusal to declare a no-fly zone over Ukraine and said Ukraine has sought ways to procure air defense assets, though he didn't elaborate. U.S. President Joe Biden announced another $200 million in aid to Ukraine, with an additional $13 billion included in a bill that has passed the House and should pass the Senate within days. NATO has said that imposing a no-fly zone could lead to a wider war with Russia. Moscow has said it would establish humanitarian corridors out of conflict zones, but Ukrainian officials have accused Russia of disrupting those paths and firing on civilians. Russian forces have hit at least two dozen hospitals and medical facilities, according to the World Health Organization. Ukrainian Deputy Prime Minister Iryna Vereshchuk said just nine of 14 agreed-upon corridors were open on Saturday, and that about 13,000 people had used them to evacuate around the country. The leaders of France and Germany spoke Saturday with Russian President Vladimir Putin in a failed attempt to reach a cease-fire. To end the war, Moscow has demanded that Ukraine drop its bid to join NATO and adopt a neutral status; acknowledge the Russian sovereignty over Crimea, which it annexed from Ukraine in 2014; recognize the independence of separatist regions in the country’s east; and agree to demilitarize. Thousands of soldiers on both sides are believed to have been killed along with many civilians, including at least 79 Ukrainian children, the government said. The Russian invaders appear to have struggled more than expected against determined Ukrainian fighters. Still, Russia’s stronger military threatens to grind down Ukrainian forces. The United Nations has said the fighting has displaced millions of Ukrainians within the country on top of the millions who have left. Elena Yurchuk, a nurse from the northern city of Chernihiv, was in a Romanian train station Saturday with her teenage son, Nikita, unsure whether their home was still standing. “We have nowhere to go back to,” said Yurchuk, 44, a widow who hopes to find work in Germany. “Nothing left.”