TYRE, July 25: A UN observation post in south Lebanon was destroyed in an Israeli air raid that caused casualties on Tuesday, a UN spokesman told AFP. Another news agency Reuters however said four UN observers were killed in the attack. “An air bombardment hit directly a building of UN observers, which is a house and a shelter, in Khiam,” said Milos Strugar, spokesman of the UN Interim Forces in Lebanon (UNIFIL).—AFP