A fourth suspect in a disrupted plot to bomb New York City subways has been arrested in Pakistan, law enforcement officials said Monday.
The principal suspect in the case, Najibullah Zazi, has pleaded guilty and is cooperating with investigators, key developments that prosecutors hope will help them trace the plot back to its roots in Pakistan, where Zazi and former friends from high school allegedly traveled in 2008 to seek terror training.
After returning to the United States, the plotters allegedly hoped to detonate bombs on trains at two of the city's biggest subway stations: Times Square and Grand Central Terminal, according to the two officials.
The officials spoke on condition of anonymity because they were not authorized to discuss details of the investigation. The new details in the case were first reported in Monday's editions of the New York Daily News.
Federal prosecutors have already said publicly they were seeking other suspects overseas. Three suspected members of the plot have been charged in the U.S. The two officials say a fourth person was arrested in Pakistan weeks ago in connection with the case.
Officials would say little else about the fourth person, other than the suspect is a citizen of Pakistan.
Both officials cautioned the person may not ultimately be charged with playing a role in the bomb plot.