The agreements were made at the 8th meeting of the State Commission on the Delimitation of the State Border between Azerbaijan and Armenia, and the Commission on the Matters of Delimitation of the State Border and Border Security between Armenia and Azerbaijan.

The two South Caucasus republics have been trying to agree on a formal peace treaty for months, but talks became bogged down on issues including the demarcation of their 1,000-kilometer (620-mile) border, which remains closed and heavily militarized.

On Friday, Armenia agreed to return four villages, which Yerevan has controlled since the early phases of the countries’ three-decade-long conflict in the early 1990s, to Azerbaijan.

Azerbaijan had stated that the return of its lands was a necessary precondition for a peace deal to end three decades of conflict over the region of Nagorno-Karabakh, which Azerbaijan retook in September.