Russia expressed "serious concern" on Monday over rising tensions in the Nagorno-Karabakh region, where it said five people had been killed in a shoot-out between ethnic Armenians and Azerbaijani troops on Sunday.
Russia's defence ministry said the Azerbaijani troops had opened fire on a car carrying local law enforcement officials in the restive region, killing three and injuring another. In return fire, the pro-Armenian officials killed two Azerbaijani troops, Moscow said.
The deadly clash comes three months into the latest standoff between Baku and Yerevan over the region.
