Turkish Foreign Minister Mevlut Cavusoglu held on Sunday a phone conversation with his Russian counterpart Sergey Lavrov to discuss the ongoing conflict in Upper Karabakh, an internationally recognized Azerbaijani territory occupied by Armenia, a diplomatic source said.

Mevlut Cavusoglu and Sergei Lavrov discussed Armenia's ceasefire violations, the insider said.

According to the source, Cavusoglu asked Lavrov to warn Armenia about complying with the truce, which came into effect on Saturday for the exchange of prisoners and retrieval of bodies.