Russian peacekeepers have registered two violation of the ceasefire in Nagorno-Karabakh, according to a statement from the Russian Defense Ministry, published on Tuesday, May 2.

"There were two violation of the ceasefire regime in the Martuni region. There were no casualties," the report said.

An investigation into the incident is underway, the Ministry added. "The command of the Russian peacekeeping contingent, together with the Azerbaijani and Armenian sides, is conducting an investigation into this fact," the Ministry of Defense said.