A Libyan security official says at least two people were killed when a stray rocket hit their house as rival militias exchanged heavy fire around Tripoli's international airport, AP reported.
The bombardment resumed early Sunday after cease-fire efforts failed, the official said.
The weeklong battle over the airport is being waged by a powerful militia from the western city of Zintan, which controls the facility, and militias, including fighters from Misrata, to the east of Tripoli.
A Libyan Arab Airlines plane was hit by a mortar shell and a column of black smoke could be seen billowing from inside the airport, which has been closed since Monday.