But hurdles remain. Azerbaijan also said Armenia’s constitution must “eliminate the claims against the sovereignty and territorial integrity of Azerbaijan,” as a prerequisite to allow for the signing of the peace treaty.

The European Union says conclusion of Azerbaijan and Armenia talks and agreement on the text of a possible treaty, "a decisive step."

Armenia and The Azerbaijan Republic have reached an agreement on a peace treaty, marking a significant step toward ending nearly four decades of conflict between the two former Soviet republics, officials from both countries announced on Thursday.