Azerbaijan's position on the Nagorno-Karabakh conflict is clear - updated Madrid principles are the base document, Azerbaijani Foreign Minister Elmar Mammadyarov said, Azerbaijani Foreign Ministry tweeted.

Mammadyarov made the remarks during his meeting Feb. 10 in Baku with Swedish Foreign Minister Margot Wallstrom.

“By use of force changing internationally recognized borders of states is unacceptable,” Mammadyarov said.

The conflict between the two South Caucasus countries began in 1988 when Armenia made territorial claims against Azerbaijan. As a result of the ensuing war, in 1992 Armenian armed forces occupied 20 percent of Azerbaijan, including the Nagorno-Karabakh region and seven surrounding districts.

The two countries signed a ceasefire agreement in 1994. The co-chairs of the OSCE Minsk Group, Russia, France and the US are currently holding peace negotiations.

Armenia has not yet implemented the UN Security Council's four resolutions on the liberation of the Nagorno-Karabakh and the surrounding regions.