Biggest drone strike hits Ukraine's second city

Ihor Terekhov said that overnight Russia launched 48 drones, two missiles and four gliding bombs in an attack he described as "open terror".BBC reported.

It comes after a massive wave of drones and missiles struck across Ukraine on Thursday night. Moscow said the strikes were in response to "terrorist attacks by the Kyiv regime", following Ukraine's surprise raids on Russian air bases last Sunday.

Meanwhile, Russian and Ukrainian officials released conflicting accounts about when a prisoner swap agreed at earlier talks will take place.

Some 18 apartment buildings and 13 other homes in Kharkiv were hit overnight during Friday's attack, the city's mayor said. A baby and a 14 year-old girl were among the injured, he added.

One civilian industrial facility was attacked by 40 drones, one missile and four bombs, Kharkiv governor Oleh Syniehubov said, adding that there may still be people buried under the rubble.

Two people were also killed in Russian strikes on Kherson, in southern Ukraine, local authorities said.

Ukrainian Foreign Minister Andriy Sybiha urged allies to increase pressure on Moscow and to take "more steps to strengthen Ukraine" in response to Russia's latest attacks.

Six people were killed and 80 injured across Ukraine the previous night, when Russia attacked the country with more than 400 drones and nearly 40 missiles.