Islamabad ? Pakistani officials reversed course Monday on a recently captured American suspected of being a member of al-Qaida, saying the man is not the terror network’s U.S.-born spokesman, as they initially believed.

The man arrested in the southern city of Karachi was first identified as al-Qaida spokesman Adam Gadahn, the most wanted American in the terrorist network. But authorities later said it was a case of mistaken identity and that they have a different American in custody.

Pakistani intelligence officials instead identified him as Abu Yahya Majadin Adam, a name similar to one listed on the FBI’s Web site as an alias for Gadahn.