Employees of Ukraine’s largest private energy firm, DTEK, were travelling about 40 miles from frontline, says police

A Russian drone attack on a bus carrying mine workers in Ukraine’s central-eastern Dnipropetrovsk region has killed at least 12 people, officials said.

The bus was driving about 40 miles (65km) from the frontline, according to police. Images published by Ukraine’s state emergency service showed what appeared to be an empty bus, its side windows shattered and windscreen hanging from the front.