Ukrainian officials say a missile and drone attack killed dozens, right as the U.S. Army secretary arrived to push for peace talks.

Another 40 people were wounded in the overnight strikes on Ukraine that targeted energy and transport infrastructure, forcing emergency power cuts in a number of regions.

Oil prices fell 1.5% on Friday, extending declines for a third straight session, as the United States pushed for a Russia-Ukraine peace deal that could swell global market supply, while uncertainty over its rate cuts curbed investors' risk appetite.

At least 10 people were killed and 37 injured, including 12 children, during a large Russian strike on the city of Ternopil in western Ukraine, said Igor Klymenko, Ukraine's minister of internal affairs. He said the western regions of Lviv, Ivano-Frankivsk, and Ternopil were "under a massive enemy attack" on Wednesday.