Language in the "peace deal" will give the U.S. exclusive rights to develop a key transit route that will be named after Trump.

Armenia still must amend its constitution to remove a reference to Nagorno-Karabakh, Azerbaijan's ambassador to Britain said.

WASHINGTON (Reuters) -Azerbaijan and Armenia signed a U.S.-brokered peace agreement on Friday during a meeting with U.S. President Donald Trump that would boost bilateral economic ties after decades of conflict and move them toward a full normalization of relations.