Islamabad, Pakistan (CNN) - Pakistan's intelligence agency has detained several people who gave information to the United States before it killed Osama bin Laden, officials in Pakistan said Wednesday.

The agency detained several people who cooperated with the CIA, a Pakistani official said; the official did not know the precise number. One rented a safe house to the CIA in Abbottabad, the Pakistani city where U.S. special forces killed bin Laden early May 2, a Pakistani source familiar with the arrests said Wednesday.

News of the arrests, first reported by The New York Times, is likely to further strain an already rocky relationship between the two countries.