UPDATE: Between four and eight people have reportedly been taken into custody for questioning in Pakistan in connection with the investigation of the Times Square bombing attempt.
Authorities are not saying who the potential suspects are or where they are being held, but they say there were raids Monday night and Tuesday morning in different locations.
Some of them may be related to suspect Faisal Shahzad, the Pakistani-born U.S. citizen who was arrested overnight in New York according to the report.
Pakistani authorities have detained at least one man in connection with the Times Square bombing attempt in New York, two intelligence officials said Tuesday.
The man, identified as Tauseef, was a friend of Faisal Shahzad, the American of Pakistani origin who is in custody in the United States over the failed attack, one official said. He was arrested in the southern city of Karachi, said the official, who like all Pakistani spies refuses to be named in the media.
Another official said several people had been taken into custody in Karachi since the failed attack Saturday.
Neither said when the detentions had taken place. They said no charges had been filed.
Shahzad was arrested in New York on Monday as he was about to board a flight to Dubai.
U.S. officials have said the 30-year-old had recently returned from Pakistan, raising speculation he may have been in contact with al-Qaida or Taliban groups in the South Asian country.