A Libyan military spokesman announced Sunday a ceasefire starting from 9:00 p.m. local time ( 2000 GMT) following an African Union's call for stopping clashes, Xinhua reported.
All army units across Libya were told to observe the ceasefire, the spokesman said at a press conference in Tripoli on Sunday.
Western warplanes bombed some of the areas in Tripoli Sunday, the Libyan state TV reported, showing footages of people injured by the airstrikes.
Heavy anti-aircraft fire was heard in Tripoli at around 8:10 p. m. local time (19:10 GMT), said a Xinhua reporter.
UN chief Ban Ki-moon said on Sunday that he hoped the Libyan army would "keep its word" on the new ceasefire.
The Libyan army declared a ceasefire on Friday after UN Security Council authorised any necessary measures, including a no- fly zone, to stop his forces harming civilians in the fight against the rebels.
Libyan leader Muammar Gaddafi vowed on Sunday to snatch a victory over Western forces which began on Saturday to launch air strikes against his troops.