The exodus of foreigners from Libya is gathering pace with at least 22 people killed in the latest clashes in Tripoli and warnings of worse to come.
Thousands of Egyptians seeking to flee the strife-torn North African country were being airlifted home on Sunday after being allowed into neighbouring Tunisia, many after a wait of several days at a border crossing.
And a British navy ship was evacuating Britons from Tripoli, the defence ministry in London said.
The latest flare-up, which broke out on Saturday, takes the death toll in Tripoli to 124 since July 13, with more than 500 wounded.
A medical source said the weekend casualty figures of 22 dead and 72 wounded did not cover hospitals outside Tripoli, in particular in the town of Misrata which has sent fighters to the capital.
The transitional government said "several hundred" families had been displaced and there was a "worsening humanitarian situation" in Tripoli, where petrol, bottled gas and food supplies are scarce.
On Sunday, the city centre was livelier than in past days despite the renewed fighting around the airport to the south.
However, most shops and banks were shut and the sky was filled with black smoke from a fuel depot ravaged by a fire resulting from the clashes of the past two weeks.
Tripoli airport has been closed and several aircraft destroyed or damaged in the clashes between rival militias which fought together in 2011 to help overthrow dictator Moamer Kadhafi.
The unrest is seen as a struggle for influence, both between regions and political factions, as Libya plunges into chaos, with authorities failing to control the dozens of militias in the absence of a structured regular army and police force.
In Tunisia, buses started on Saturday picking up Egyptian evacuees at the Ras Jedir border crossing to take them to Jerba airport, 100 kilometres north, for flights back to Egypt.
Egypt's civil aviation minister, Hossam Kamal, said 1796 people had been taken to Jerba and another 1355 were to be transferred there on Sunday, with five flights home planned.
As of Saturday evening, about 6000 people were awaiting evacuation and neither Libya, Egypt nor Tunisia could say on Sunday how many were still awaiting transport.
"The humanitarian situation is critical, as some people haven't eaten for five or six days," Red Cross official Mongi Slim said.
"The authorities have allowed us to provide them with food."
Tunisia had refused to admit people who were neither Libyan nor Tunisian unless they could prove they would be immediately repatriated and were only transiting the country.
The government said it could not cope with a large number of Arab or Asian workers fleeing Libya as it did during the anti-Kadhafi armed revolt of 2011.
The Ras Jedir crossing was shut on Friday and part of Saturday after violent clashes between Libyan border guards and hundreds of Egyptians trying to storm the border post.
On Sunday, the crossing was operating normally.
Since mid-July, Libya has seen deadly clashes been rival militias in both Tripoli and the eastern city of Benghazi.
Tripoli airport has been closed since gunmen, mostly Islamists, attacked it in a bid to wrest control from the former rebels who have held it since the 2011 revolt.
