"Reports about fighting on the Armenia-Azerbaijan border are extremely worrying. Need a complete and sustainable ceasefire," President of the European Council Charles Michel wrote on Twitter, APA reports.
"There is no alternative to peace and stability - and there is no alternative to diplomacy to ensure that," noted Michel.
"I am in contact with both leaders Azerbaijani President Ilham Aliyev and Armenian Prime Minister Nikol Pashinyan.
Josep Borrell has asked EU Special Representative Klaar to travel to Baku and Yerevan to work on preventing further escalation," added President of the European Council.