Hassan Mustafa Osama Nasr (Arabic: حسن مصطفى أسامة نصر Ḥassan Muṣṭafā Usāmah Naṣr) (born 18 March 1963), also known as Abu Omar, is an Egyptian cleric.

[1] This "Abu Omar case" prompted a series of investigations in Italy, culminating in the criminal convictions (in absentia) of 22 CIA operatives, a U.S. Air Force colonel, and two Italian accomplices, as well as Nasr, himself.

[2] He is a member of al-Gama'a al-Islamiyya, an Islamic organisation that was formerly dedicated to the overthrow of the Egyptian government; the group has committed to peaceful means following the coup d'état that toppled Mohamed Morsi.

On 17 February 2003, Nasr was abducted by CIA agents[1] as he walked to his mosque in Milan for noon prayers, thus becoming an effective ghost detainee.

Nasr's case has been qualified by Swiss senator Dick Marty as a "perfect example of extraordinary rendition", and in Italy prompted a series of investigations and intrigues within the Italian intelligence community and criminal justice system collectively referred to as the Imam Rapito (or "kidnapped Imam") affair in the Italian press.

[11][12][13] In 2010, leaked diplomatic documents revealed the efforts the United States used in an attempt to stop Italy from indicting the CIA agents, and that Italian Prime Minister Silvio Berlusconi assured US Secretary of Defense Robert Gates that he was "working hard to resolve the situation" but that Italy's judicial system was "dominated by leftists".

[14] In July 2013, Robert Seldon Lady was initially detained in Panama at the request of Italian authorities, but then released and allowed to board a flight to the United States.