EU's Costa urges Hungary's Orban to respect 90 bln euro loan deal for Ukraine, letter shows

European Council President Antonio Costa on Monday urged Hungarian Prime Minister Viktor Orban to honour an EU deal for a 90 billion euro ($106.11 billion) loan to Ukraine, after Budapest said it would block the plan until Russian oil flows again through the Druzhba pipeline that traverses Ukraine.

"When leaders reach a consensus, they are bound by their decision. Any breach of this commitment constitutes a violation of the principle of sincere cooperation," Costa, who chairs summits of EU leaders, said in a letter to Orban seen by Reuters.