MADRID, Spain (CNN) -- A Moroccan terror suspect held in Britain was extradited Friday to Spain, where he faces possible charges of conspiracy in the Sept. 11, 2001 attacks in the United States and membership in a terrorist group, a Spanish court source told CNN.

Flanked by Spanish police Farid Hilali arrives in Madrid on Friday to face terrorism charges.

The suspect, Farid Hilali, 39, was arrested in Britain in 2004 on a Spanish warrant but had been fighting extradition, eventually losing his legal battles to stay out of Spain, a Spanish National Police statement said Friday.

Hilali was due to appear later Friday in Madrid, the court source said, before Judge Baltasar Garzon, who named Hilali in a 2003 indictment of suspected members of a Spanish cell of al Qaeda.

Twenty-four of those suspects stood trial in Madrid in 2005, including three key defendants charged with conspiracy in the Sept. 11 attacks. But the court acquitted two of them on that charge, and convicted only one, Syrian-born Imad Eddin Barakat Yarkas, on the conspiracy charge.