Russia launched an early morning air attack on Kiev on Tuesday, the Ukrainian military said, just days after a US-led round of peace talks in Miami ended on Sunday.
"Air defence forces are working to eliminate the threat in the sky over the capital," the Kiev military administration said on Telegram, urging residents to remain in shelters until the all-clear is given.
Officials did not immediately report casualties or damage.
The full-scale of the attack was not immediately known.
The weekend talks in Miami brought together US officials with Ukrainian and European delegations, alongside separate contacts with Russian representatives, as Washington tested whether there was scope for a settlement to end Russia's war in Ukraine.
Positive signal in war talks
Ukrainian President Volodymyr Zelenskyy has said that the negotiations aimed at ending the nearly four-year war with Russia were "very close to a real result."
Speaking at a gathering devoted to Ukrainian diplomats, Zelenskyy said talks involving Ukraine, the United States and European partners had made significant progress.
"It all looks quite worthy … And here it is important that this is the work of both us and the United States of America. This suggests that we are very close to a real result," he said.
Ukrainian negotiators led by senior official Rustem Umerov have held a series of meetings with US envoys, including recent discussions in Florida.
Russian negotiator Kirill Dmitriev, an investment envoy for President Vladimir Putin, has also been holding separate talks with US officials in the same location.
Officials in both Ukraine and Russia said their delegations were returning home on Monday to report on the outcome of the discussions.
