Tripoli, Libya (CNN) -- Libyan rebels expressed fresh optimism that Moammar Gadhafi's reign is about to crumble as a deadline looms for Gadhafi loyalists to disarm or face assault. "I think this thug, this killer knows that he has nowhere to go," said Ali Tarhouni, finance and oil minister for the opposition's National Transitional Council. Tarhouni said he expects Gadhafi's four-decade rule to fall apart within a week. "I really have no problem with waiting another week," he said Tuesday. "I've waited 42 years." But Gadhafi's whereabouts are still unconfirmed, 11 days after opposition forces stormed the capital and later captured his Tripoli compound.Opposition member: "I think this thug, this killer knows that he has no where to go"60% of Tripoli is without water or sanitation, the U.N. secretary-general saysReport: A teen says he saw Moammar Gadhafi on Friday in TripoliRebels set a Saturday deadline for Gadhafi loyalists to surrender
Ban said he hoped to have _ personnel on the ground "as quickly as possible."