Iraq's foreign minister said Saturday he could not confirm reports that the killing of British hostage Kenneth Bigley followed an attempt to flee his captors. "I really at this stage have no full certain information to confirm this report," Hoshyar Zebari told British Broadcasting Corp. radio. A U.S. official has said there were credible reports that Bigley tried to escape with the aid of one of his captors. But the British Embassy in Baghdad was unable to confirm or deny the claims. No one was immediately available for comment at the Foreign Office in London early Saturday.