12:55 p.m.

Russia's Foreign Ministry has condemned the killing of Iran's top general in a U.S. airstrike at Baghdad's airport and said it will increase tensions throughout the Middle East.

An unnamed diplomat in the ministry told Russia's state-run news agency TASS they consider the killing of Gen. Qassem Soleimani "an adventurist step."

The head of the foreign affairs committee in Russia's upper parliament house called the U.S. airstrike "a mistake" that could "boomerang on its organizers." Konstantin Kosachev in a Facebook post Friday said the move destroyed the last hope to resolve the issues around the Iran nuclear deal.

And "Iran may accelerate making a nuclear weapon now, even if it didn't plan on doing it before," Kosachev said.

12:40 p.m.

China says it is "highly concerned" and calls for all sides, especially the United States, to exercise "calm and restraint" after a U.S. airstrike killed Iran's top general in Baghdad.

Foreign Ministry spokesman Geng Shuang said Friday that China is calling for peace and stability in the Middle East as well as respect for Iraq's independence and territorial integrity.

The spokesman added that "China has always opposed the use of force in international relations" and warned against the further escalation of tensions.

China is a close Iranian ally and has been among the most active countries in defying U.S. attempts to isolate Iran and cripple its economy. Last month, its navy joined with those of Iran and Russia in first-ever joint drills in the Indian Ocean.

China is also a staunch opponent of the U.S. presence in Iraq.

12:25 p.m.

Iraq's deputy parliament speaker says an emergency parliament session is set for Saturday to discuss the U.S. airstrike in Baghdad that killed Iran's top military commander and Iraqi officials.

Hassan al-Kaabi says it is time to put an end to "U.S. recklessness and arrogance," adding that Saturday's session will be dedicated to taking "decisive decisions that put an end to U.S. presence inside Iraq."

The outgoing Prime Minister Adel Abdul-Mahdi had called for an emergency session, saying the U.S. presence in Iraq is limited to training forces to fight terrorism. He described the attack that killed Gen. Qassem Soleimani and the Iraqi officials a "violation" of conditions for the U.S. troop presence.

12:05 p.m.

Israeli Prime Minister Benjamin Netanyahu's office says he is cutting short a visit to Greece and returning home to follow "ongoing developments" after a U.S. airstrike killed Iran's top general.

The Israeli army has ordered a ski resort on Mount Hermon, on the Israel-controlled Golan Heights, to close. It took no other immediate precautions.

Yair Lapid, a leader of the opposition Blue and White Party, praised the killing and said Gen. Qassem Soleimani got "exactly what he deserved."

The head of Iran's elite Quds Force topped Israel's list of threats, accused of masterminding a network of enemies that included the Hezbollah militant group in Lebanon. Israel has struck Quds Force targets in Syria on several occasions.

Yoel Guzansky, an expert on Iran at the Tel Aviv-based Institute for National Strategic Studies, said Iranian retaliation against U.S. or Israeli targets was likely in the short term. Guzansky said the killing struck a huge blow to Iran and restored American deterrence in the region.

11:50 a.m.

Iran's President Hassan Rouhani has called the killing of the country's Revolutionary Guard commander Gen. Qassem Soleimani by the U.S. a "heinous crime."

Rouhani said in a tweet on Friday that "the great nation of Iran will take revenge" for the U.S. airstrike near Baghdad's airport.

Iran's president added that "the path of resistance to U.S. excesses will continue."

The targeted killing could draw forceful Iranian retaliation against American interests in the region and spiral into a far larger conflict.

The state-run IRNA news agency also published a Rouhani statement saying the U.S. violated all human rights and international law.

11:30 a.m.

The United States is urging U.S. citizens to leave Iraq "immediately."

A State Department statement on Friday cites "heightened tensions in Iraq and the region." Iran has vowed "harsh retaliation" after a U.S. airstrike killed Iran's top military commander in Baghdad.

The State Department adds that "due to Iranian-backed militia attacks at the U.S. Embassy compound, all consular operations are suspended. U.S. citizens should not approach the Embassy."

That comes after a crowd attacked the embassy earlier this week to protest U.S. airstrikes against a militia supported by Iran.

11:20 a.m.

Iraq's outgoing prime minister has sharply condemned the U.S. airstrike that killed Iran's top military commander and a senior Iraqi official in Baghdad and called for an emergency parliament session to take "necessary and appropriate measures to protect Iraq's dignity, security and sovereignty."

Prime Minister Adel Abdul-Mahdi said Friday the men killed were "major symbols in achieving victory against" Islamic State group militants. He called the attack that killed Abu Mahdi al-Muhandis an "aggression against Iraq."

"Liquidation operations (assassinations) of leading Iraqi officials or from a friendly country on Iraqi soil is a brazen violation of Iraq's sovereignty and blatant attack on the nation's dignity," Abdul-Mahdi said.

He called the attack "a dangerous escalation" that is set to ignite a destructive war in Iraq and the region. He added it is also an "obvious violation of the conditions of U.S. troop presence in Iraq, which is limited to training Iraqi forces" to fight IS militants.

11:10 a.m.

The head of Iran's parliamentary committee on national security and foreign policy has threatened U.S. forces in the Middle East during an interview on state television.

Hard-line lawmaker and cleric Mojtaba Zolnouri made the threat Friday after a U.S. airstrike near Baghdad killed Iran's top general, Qassem Soleimani.

Zolnouri told state TV: "When the U.S. is killing Iranian forces outside of Iran, the U.S. must see its troops killed at its bases in the region."

A senior Revolutionary Guard commander, Gen. Mohammad Reza Naghdi, said that "the White House must leave the region today or it must go to the market to order caskets for soldiers." The general added: "We don't want bloodshed. They have to choose by themselves."

Iran's Supreme Leader Ayatollah Ali Khamenei has warned that a "harsh retaliation is waiting" for the U.S. And Iran's cabinet spokesman, Ali Rabiei, said in a tweet that Iran's severe response won't be far away.

10:45 a.m.

Syria has strongly condemned what it calls "treacherous American criminal aggression" that killed Iran's top general and others, warning that it constitutes a "dangerous escalation" in the region.

The U.S. airstrike near Baghdad's airport killed Gen. Qassem Soleimani, the head of Iran's elite Quds Force. Soleimani was considered the architect of Iran's policy in Syria.

The Syrian foreign ministry says the attack reaffirms the U.S. responsibility for the instability in Iraq as part of its policy to "create tensions and fuel conflicts in the countries of the region."

The statement says the attack will only strengthen the resolve to continue down the path set "by the martyred leaders of the resistance against American interference in the affairs of the countries of the region."

10:25 a.m.

Iran's foreign minister says the U.S. airstrike near Baghdad's airport that killed Iran's top general "without any doubt is an act of state terrorism."

Mohammad Javad Zarif also calls the airstrike a violation of Iraq's sovereignty.

"Perhaps America's action was a response to the pain that this great man had inflicted on them," Zarif said of Gen. Qassem Soleimani, the head of Iran's elite Quds Force.

The killing will make Iran's people more united and "will also make U.S. policies more scandalous and less effective than before," he said.

The targeted killing could draw forceful Iranian retaliation against American interests in the region and spiral into a far larger conflict.

3 a.m.

The United States has killed Iran's top general in an airstrike at Baghdad's international airport, an attack that threatens to dramatically ratchet up tensions in the region. The targeted killing of Gen. Qassem Soleimani, the head of Iran's elite Quds Force, could draw forceful Iranian retaliation against American interests in the region and spiral into a far larger conflict.

The Defense Department says it killed Soleimani because he "was actively developing plans to attack American diplomats and service members in Iraq and throughout the region." An adviser to Iran's President Hassan Rouhani is warning U.S. President Donald Trump of retaliation.