Armenia and Azerbaijan have agreed on the text of a peace agreement, potentially ending over 35 years of conflict, though Azerbaijan has set several preconditions before signing.

Armenia and Azerbaijan were locked in conflict over Nagorno-Karabakh for nearly four decades after the Soviet Union they were both members of collapsed.Here is a look at the history of the conflict and the latest developments as Armenian and Azerbaijani officials said on Thursday that they had agreed the text of a peace agreement.

After decades of conflict, Armenia and Azerbaijan have agreed to the text of a peace treaty. Plenty of hurdles remain before it can be signed.

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.

UN Secretary-General Antonio Guterres on Friday welcomed announcements by Azerbaijan and Armenia that they have concluded negotiations on a draft peace agreement.

Armenia and Azerbaijan have finalized the text of a peace agreement, marking a breakthrough in efforts to end nearly four decades of hostilities over Nagorno-Karabakh. Both countries confirmed on Thursday that

Armenia and Azerbaijan were locked in conflict over Nagorno-Karabakh for nearly four decades after the Soviet Union they were both members of collapsed.

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

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, a sudden breakthrough in a fitful and often bitter peace process.