UPDATE: U.S. officials confirmed Tuesday afternoon that al-Libi was killed in the drone strike.
With reporting from Barbara Starr
Abu Yahya al-Libi, the no. 2 man in al Qaeda and a longtime public face of the terror network, has been targeted by a drone strike in Pakistan's tribal region, a U.S. official said Tuesday.
Investigators are trying to determine whether al-Libi was injured or killed in the Monday hit, which left 15 militants dead and three others wounded, the official said. Intelligence officials may find out al-Libi's fate only from monitoring websites and chatter, according to the official.
A senior Pakistani official said investigators have to verify that al-Libi was among the dead. Eight of the victims from the strike were "foreigners," with most of them Arabs, the Pakistani official said.
The drone fired at least six missiles at a militant compound near the town of Mir Ali in the North Waziristan region near the Afghanistan border.