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, the 31-year-old man who has appeared in several al-Qaida videos threatening the West since 2001.

“The resemblance of the name initially caused confusion, but now they have concluded he is not Gadahn,” said an intelligence officer, who, like all Pakistani intelligence agents, spoke on condition of anonymity.