Armenian and Azerbaijani leaders to meet in Brussels on Sunday. The two countries have been fighting for control of the Nagorno-Karabakh region.

The presidents of France and Germany will also meet on the sidelines of the summit. The talks are the latest in a long line of attempts to resolve the conflict between the two countries, which began in the early 1990s. The U.S. and Russia have been mediating between the countries for years, but have not reached an agreement.