whether he was involved in this case or not.”

One of those detained in the raids here overnight was believed to be Tauseef Ahmed, a purported cousin of Shahzad, sources said, adding that he was arrested from a predominantly residential neighborhood of Karachi called Gulshan-e-Iqbal.



Shahzad, whose father was a ranking member of the Pakistani military, seems to have had connections in Islamabad also. Pakistani authorities said that he had given an Islamabad address on his disembarkation card. He traveled on a 10-year, multiple entry visa, the sources added.

It was not clear Tuesday night whether any arrests had been made here in connection with the case in New York, where Shahzad was captured Tuesday on board a Dubai-bound plane set to depart from Kennedy International Airport.

But it was clear thatPakistan, which has been routinely criticized by U.S. counter-terrorism officials for dragging its feet in confronting Taliban and Al Qaeda elements inside the country, seemed to be going out of its way to publicly demonstrate cooperation with U.S. officials in the investigation.

Pakistani foreign minister Shah Mahmood Qureshi met almost immediately with U.S. Ambassador Anne W. Patterson, and assured her of full cooperation.

It was announced that one of Pakistan's top cops, and Director of the Federal Investigation Agency, Khalid Qureshi, was heading up a high-level team to investigate the matter.

U.S. officials have said that the 30-year-old Shahzad had recently returned to his home in Connecticut after a five-month stay in Pakistan.

The trip to Pakistan, where it is believed his wife and two children are living, included a visit to