Libyan warplanes on Tuesday launched three new air strikes on the rebel-held oil port of Ras Lanouf. There was no immediate word on casualties but the Reuters news agency reported one raid had hit a residential area.
The strikes come as world powers step up their plans to impose a no-fly zone over Libya. Britain and France are currently drafting a UN Security Council resolution.
The rebels hold a number of towns in eastern Libya but they have clashed with Gaddafi loyalists as they try to advance westwards.
Gaddafi maintains a strong grip on the capital Tripoli and his hometown Sirte. On Monday, his forces recaptured the town of Bin Jawad using air strikes and heavy bombardments. The rebels had taken control of the town on Friday.
Doctors said dozens of people were killed and some 50 wounded during Monday’s fighting.