Armenia, Azerbaijan blame each other for civilian casualties
Russia is calling for an immediate ceasefire in Nagorno-Karabakh and says Moscow is ready to help seek a solution to the conflict via the Organization for Security and Co-operation in Europe.
Azerbaijan and Armenia are accusing each other of targeting civilians.
At least 10 people have died in bombings on Stepanakert and Shushi.
Al Jazeera's Bernard Smith reports from the disputed region's biggest city, which has been under sustained bombardment from Azeri forces.