The landlocked mountainous region of Nagorno Karabakh remains one of the frozen conflicts of post-Soviet rule. It declared its independence from Azerbaijan in 1991 leading to a bloody war with ethnic Armenians who make up most of the population of the enclave. Since a truce in 1994 it has remained in an unsteady deadlock.
Although most people there consider themselves Armenian, technically the province lies in the territory of Azerbaijan.
Its independence has never been recognised by the international community and repeated diplomatic attempts to find a solution have so far failed.
Three presidents are involved in searching for a solution: Medvedev of Russia, Sargsyan of Armenia, and Aliev of Azerbaijan. They last met in March and on Friday they will convene once more in the southern Russian town of Kazan, to attempt to break the impasse.
Ahead of the meeting the Azeri and Armenian leaders shared their thoughts on the situation with euronews.