WATCH: Missiles strike oil depot in Belgorod, Russia
Firefighters are tackling a blaze at an oil storage depot in Belgorod in Russia.
The local governor said the facility was attacked by two Ukrainian helicopters.
Belgorod, a city of 370,000, lies just north of Ukraine's second city Kharkiv.
The footage in this video has been verified by the BBC but its source cannot be confirmed.