This is stated on the website of the Russian Foreign Ministry.

"Sergey Lavrov expressed his serious concern over the ongoing shelling along the Contact Line, which entailed casualties, including among the civilian population," the Russian Foreign Ministry said.

Lavrov also stressed the need for an early ceasefire. 

He noted that the Russian side, together with other co-chairs of the OSCE Minsk Group, will continue to undertake mediation efforts aimed at stabilizing the situation.

Earlier, Lavrov had a conversation with his Armenian counterpart Zohrab Mnatsakanyan. During the conversation, the Russian Foreign Minister also expressed serious concern over the hostilities in the zone of the Nagorno-Karabakh conflict and called for an early ceasefire.