The announcement comes just days after London strongly recommended its citizens to leave the city of Benghazi due to the "specific and imminent threat" against Westerners.

Fears of an attack on British nationals have mounted since at least 38 hostages were killed in after the In Amenas gas plant, near the Libyan border, was taken by armed militants.

Libyan officials said they did not know about such reported threats, with the British embassy yet to elaborate on the situation.

Voice of Russia, RT