India, Jan. 5 -- Russia on Monday launched an air attack on Kyiv, Ukraine's capital, mayor Vitali Klitschko said on Monday, as he issued a 'stay in shelters' warning for the residents. A raid alert was also issued in Kharkiv, according to the latest raid alert map of Ukraine.

"Air defence forces are operating in the capital. Stay in shelters!" Klitschko said in a message on the Telegram app.

Unverified visuals on social media captured the activation of the air defence forces.

Earlier on Friday, five people were killed in a Russian missile attack on Kharkiv and two people were killed in Ukrainian drone strikes in Russian border regions, local officials said on Sunday.

Notably, Ukraine has fired drones towards Moscow every day so far in...