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

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.

By Felix Light and Nailia Bagirova TBILISI/BAKU (Reuters) -Armenian and Azerbaijani officials said on Thursday that they had agreed the text of a peace agreement to end nearly four decades of conflict between the South Caucasus countries,