BRUSSELS- The European Union said on Monday it is disappointed and concerned about the Lebanese prime minister-designate's decision to quit, urging Lebanon to form a government to win financial support from the International Monetary Fund. 

"The European Union notes with disappointment and concern the resignation of Prime Minister-designate Mustapha Adib and the circumstances that led to his decision," the EU's top diplomat Josep Borrell said in a statement.

"Lebanon's leaders must unite and do their utmost for the timely formation of a government," Borrell said. "The swift formation of a government would be also crucial to reach an urgently needed agreement with the International Monetary Fund."

(Reporting by Robin Emmott, editing by Marine Strauss) ((robin.emmott@thomsonreuters.com; +32 2 287 6835; Reuters Messaging: robin.emmott.thomsonreuters.com@reuters.net))