The official said early today that fierce fighting erupted between Gen Khalifa Hifter's loyalists and a group of Islamist militias called The Benghazi Revolutionary Shura Council late yesterday.
Hifter's jets pounded Islamists' positions while militiamen responded with artillery. The hours-long clashes concentrated around the city's Benina airport.
The official says Hifter's side lost 20 fighters while the militiamen had 11 killed. He says 36 fighters in all were wounded. The official spoke on condition of anonymity because he is not authorized to talk to media.