The Foreign Office today urged British nationals to leave Benghazi in Libya "in response to a specific, imminent threat to westerners." Germany and the Netherlands have also warned their citizens to do the same.
Some airline cancelled flights in to the city as the Libyan authorities reacted angrily to the news.
The deputy leader of the Libyan congress, Jumma Atigahas, has said he was surprised at hearing of the Foreign Office's warning of an immediate threat to foreigners in Benghazi.
While the US has yet to issue any similar advice the Defence Secretary has said that the area is dangerous.