Russian drone and missile attacks hit residential and other civilian areas in Ukraine's Kyiv and Odesa regions overnight and Wednesday morning, wounding at least eight people, local officials said.
The latest attacks came as Russia and Ukraine traded fresh threats, raising concerns that the nearly five-year war could escalate further.
Ukraine's air force said the Kyiv and Odesa regions were among the main targets of the overnight Russian assault.
Russia launched 174 attack drones, including around half described as jet-powered drones that are harder to intercept, along with two ballistic missiles and two air-launched missiles, the Ukrainian air force said.
In the southern city of Odesa, an attack damaged a 24-story residential building, destroying apartments on several floors. Eight people, including a child, were injured, officials said.
Office buildings and two educational institutions were also damaged, while power outages temporarily disrupted electric public transport.
In the Kyiv region, a man and a woman were wounded by shrapnel during morning attacks, officials said.
It was the seventh consecutive day of attacks on Kyiv, although Wednesday's assault was less intense than in previous days. The attacks also caused a fire at a warehouse, while an educational facility and a medical practice were damaged.
The air war has intensified as the conflict continues, while the front lines in eastern and southern Ukraine remain largely deadlocked and efforts by the United States to broker a peace deal have yet to produce a breakthrough.
Late Tuesday, Ukrainian President Volodymyr Zelenskyy warned foreign airlines that Russian airspace was becoming increasingly unsafe because of Ukraine's long-range drone attacks. He said continued military pressure was aimed at pushing Moscow toward peace negotiations.
Russian President Vladimir Putin, however, accused Zelenskyy of “state terrorism” and rejected the possibility of negotiating with what he described as terrorists.
Speaking on the sidelines of the Shanghai Cooperation Organization summit in Kyrgyzstan, Putin was also asked whether Russia could target British military facilities if the United Kingdom continued supplying weapons to Ukraine.
He did not rule out such action, saying the matter was a “military secret.”
Meanwhile, Russia said its air defenses shot down 130 Ukrainian drones overnight over 11 Russian regions, as well as Crimea and the Black Sea.
In Russia's Belgorod border region, Ukrainian drone attacks killed two people and injured 16 others, acting regional governor Alexander Shuvayev said.
Ukraine has increasingly used domestically developed long-range drones to target Russian oil facilities and other infrastructure, seeking to put pressure on Russia's economy and bring the effects of the war closer to the Russian public.
Western analysts say Russia's attempts to make major gains on the battlefield have recently slowed.
The Washington-based Institute for the Study of War said Russia's territorial gains in August were only a fraction of those made during the same month last year.
It said Moscow's spring and summer offensive had failed to break through Ukraine's front-line defenses, with Russian advances remaining slow and limited.