Washington, July 26 (IANS) The United States closed its embassy in Libya and evacuated the staffers to neighbouring Tunisia amid security concerns in the restive **rth African country, the State Department said Saturday. "Due to the ongoing violence resulting from clashes between Libyan militias in the immediate vicinity of the US embassy in Tripoli, we have temporarily relocated all of our personnel out of Libya," Xinhua quoted spokeswoman Marie Harf as saying. She said US diplomats will continue to work on Libya issues in Tunis, Washington, or elsewhere in **rth Africa. The Obama administration has been particularly sensitive about the security of its diplomatic mission in Libya since its ambassador Chris Stevens and three other Americans were killed in an attack on the US consulate in Libya's second city Benghazi Sept. 11, 2012.