BEIRUT - An Arab satellite channel in Beirut received on Friday a bomb threat by telephone Friday, prompting the evacuation of the building as well as of UN employees in an adjacent building. The TV channel Al Arabiya and its sister company MBC received the threat from an unidentified caller claiming to be speaking on behalf of the followers of the group of slain terrorist leader Abus Musab Al Zarqawi that a bomb was about to go off in its offices in Beirut.Lebanese army troops immediately cordonned off areas near the MBC office in Hamra street and also near the building of the Al Arabiya which also houses offices for the British network BBC, the American channel CNN and the Associated press. The offices of Al Arabiya are adjacent to the building that houses the UN in Beirut which prompted security officers to immediately evacuate all employees from the UN building as well.