MOSCOW, November 6. /TASS/. Those responsible for the killing of children in east Ukrainian city of Donetsk are to be punished severely, Russian foreign ministry’s envoy for human rights and the supremacy of law Konstantin Dolgov said on Thursday.

“The killing of children in Donetsk is a gravest crime! It is to be investigated objectively and those responsible are to be punished severely,” he wrote on his Twitter account.

On Wednesday, two children were killed in Donetsk when their school came under shelling.