Pakistani officials say a man accused of being an al-Qaida computer expert has been released without charge following three years in custody.
Mohammed Naeem Noor Khan was arrested in Lahore in July 2004. Pakistani officials said investigations of his computer led to information on active al-Qaida networks.
Khan's lawyer Babar Awan told reporters Monday that he has returned to his home in the southern port city of Karachi.
Officials alleged that Khan acted as a link between top al-Qaida leaders and the organizations' operational cells.
Pakistani intelligence officials say information from his computer led them to a Tanzanian wanted for the 1998 U.S. embassy bombings in East Africa, as well as terror plots in both the United States and Britain.
Khan was never charged with a crime or brought before a court.
Some information for this report was provided by AFP and AP.