BEIRUT, Sept 22 (Reuters) - Overnight bombardment of rebel-held eastern districts of Aleppo city killed 45 people, director of al-Quds hospital Dr. Hamza al-Khatib told Reuters on Thursday.

Warplanes mounted the heaviest air strikes in months against rebel-held districts of Aleppo overnight, rebel officials and the Syrian Observatory for Human Rights said earlier.

(Reporting by Tom Perry and Ellen Francis, editing by Larry King) ((thomas.perry@thomsonreuters.com; Reuters Messaging: thomas.perry.reuters.com@reuters.net))