Conditioned by wording on Nagorno-Karabakh problem Azerbaijan refused to sign the "Eastern Partnership" final declaration at the last moment, a source at one of European embassies informed ArmInfo.
According to the reliable source, president of Azerbaijan Ilham Aliyev's refusal to participate in Riga Summit was sort of a walkout in protest against the mentioned document.
"Azerbaijan's action has disappointed the reps of European countries, moreover, Italian President Sergio Mattarella, the Chairman of the Summit, was so outraged he announced an unscheduled break", said the source.