Strong explosions were heard in the Libyan capital of Tripoli Sunday night, with smoke rising near Libyan leader Muammar Gaddafi's residence, witnesses said.

The latest blasts occurred after a Libyan military spokesman announced earlier Sunday that a ceasefire would start from 9:00 p.m. local time (1900 GMT) following an African Union's call for stopping clashes.

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.

At least 64 people were reported to have been killed and 150 others wounded following the joint operation led by the United States, France, Britain, Canada and Italy.