Putin meets leaders of Armenia, Azerbaijan as tensions over Nagorno-Karabakh simmer

Russian President Vladimir Putin, left, gestures while speaking to Azerbaijani President Ilham Aliev prior to their talks in the Bocharov Ruchei residence in the Black Sea resort of Sochi, Russia, Saturday, Aug. 9, 2014. Presidents of Azerbaijan, Armenia and Russia meet in Sochi for their talks about Azerbaijan Armenia conflict. (AP Photo/RIA-Novosti, Presidential Press Service) (The Associated Press)

Russian President Vladimir Putin, left, greets Azerbaijani President Ilham Aliev prior to their talks in the Bocharov Ruchei residence in the Black Sea resort of Sochi, Russia, Saturday, Aug. 9, 2014. Presidents of Azerbaijan, Armenia and Russia met in Sochi for their talks about Azerbaijan Armenia conflict. (AP Photo/RIA-Novosti, Presidential Press Service) (The Associated Press)

Russian President Vladimir Putin listens to Azerbaijani President Ilham Aliev during a photo-op prior to their talks in the Bocharov Ruchei residence in the Black Sea resort of Sochi, Russia, Saturday, Aug. 9, 2014. Presidents of Azerbaijan, Armenia and Russia meet in Sochi for their talks about Azerbaijan Armenia conflict. (AP Photo/RIA-Novosti, Presidential Press Service) (The Associated Press)

Russian President Vladimir Putin has met separately with the leaders of Azerbaijan and Armenia as concerns mount over the escalation of fighting around Nagorno-Karabakh.

Kremlin spokesman Dmtiry Peskov was quoted as saying that a joint meeting of all three leaders on Sunday was possible.

Nagorno-Karabakh is a part of Azerbaijan but it and some surrounding territory have been under the control of Armenian soldiers and local Armenian forces since a 1994 cease-fire ended a separatist war. Since then, there have been sporadic clashes, but tensions have risen sharply in the past week as 19 soldiers were killed, 13 of them Azeri.

Years of diplomatic efforts under the auspices of the Organization for Security and Cooperation in Europe have made little visible progress in resolving the dispute.