Up to a million unexploded cluster bombs fired by Israel could be in south Lebanon, nearly three times as many as previously estimated, UN demining experts said Tuesday. "The situation in south Lebanon now, as a result of 34 days of bombing is that there is extensive unexploded ordnance lying all over the place," Chris Clark, the top UN demining official in Lebanon, told a news conference. Clark said it could take up to the end of 2007 to clear the cluster munitions. "The job is not over yet, the casualties will reach a record high this year," said Col. Wassin Rizq, head of operations of the Lebanese army's National Demining Office.