The meeting in Kazan on the Nagorno-Karabakh conflict may lead to its resolution, RIA Novosti quoted OSCE Secretary General Marc Perrin de Brichambaut as saying.
"We hope for peace and stability in this region, and we hope that the Kazan meeting will be successful and lead to the resolution of this conflict," he said at a press conference in Moscow on Wednesday.
On June 24, Azerbaijani President Ilham Aliyev and Armenian President Serzh Sargsyan will arrive in Kazan to meet with Russian President Dmitry Medvedev to discuss the settlement of the conflict.
The conflict's settlement will be discussed within next tripartite meeting.
The conflict between the two South Caucasus countries began in 1988 when Armenia made territorial claims against Azerbaijan. Armenian armed forces have occupied 20 percent of Azerbaijan since 1992, including the Nagorno-Karabakh region and seven surrounding districts.
Azerbaijan and Armenia signed a ceasefire agreement in 1994. The co-chairs of the OSCE Minsk Group - Russia, France, and the U.S. - are currently holding peace negotiations.
Armenia has not yet implemented the U.N. Security Council's four resolutions on the liberation of Nagorno-Karabakh and the surrounding regions.