Russian strikes on logistics and infrastructure targets across Ukraine killed at least seven people on Wednesday, Ukrainian officials said, including two deaths in Kyiv in what was described as the latest in a surge of daytime drone attacks on the capital.

Officials in Kyiv said 41 people were wounded in the city. The strikes hit gas stations, offices and businesses, as well as railway infrastructure, according to Ukrainian officials.

President Volodymyr Zelensky said on social media that "Russians launched many drones against the city" and that two deaths had been reported so far.

Journalists in Kyiv reported clouds of smoke over parts of the city and a heavy smell of burning in the air, as commuters travelled to work to the sound of air-defence explosions.

The attacks came as Zelensky was due to speak at the UN General Assembly in New York, where he was expected to appeal again for better air defences against Russian drone and missile strikes.

What is known so far is based on accounts from Ukrainian officials and reporting from the ground; further details on the extent of damage and the total casualty toll were not immediately available in the supplied accounts.