Ahmad Ullah, a relative of Ullah, who Reuters tracked down on Tuesday, said his cousin's father had moved to the Bangladeshi capital of Dhaka with his family many years ago.
- Police identified the suspect as Akayed Ullah, a 27-year-old man.
Ullah has also been charged by local law enforcement with criminal possession of a weapon, a support act of terrorism and making a terroristic threat, according to the NYPD.
Counterterrorism Bureau Chief James Waters said on NY1 television that investigators had executed search warrants Monday night and recovered, "additional parts or components" of bombs, "leftover parts, if you will".
Police on Tuesday charged the cabbie turned terrorist accused of detonating a pipe bomb near the Port Authority Bus Terminal, authorities said.
Four other people suffered minor injuries. Whether he invoked Islamic State remains unclear as he "did make statements".
The statement also said the family was outraged by some of law enforcement's tactics, including pulling a teenage relative from class and questioning him without a parent, guardian or attorney present. Mayor Bill de Blasio said it was an attempted terrorist attack.
Ullah said he chose the spot when he saw a Christmas poster in the tunnel, police sources said Monday.
Ullah arrived in the United States in 2011, and the Department of Homeland Security said he is a lawful permanent resident who was living in Brooklyn. He left both behind when he returned to the U.S.
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The pipe bomb failed to detonate fully and Ullah was the only person seriously wounded by the blast..
Because the device was strapped to the suspect, the assumption is he had been prepared to die as a suicide bomber, the source said.
The man arrested in the bombing, Akayed Ullah - who told investigators he wanted to retaliate for American action against Islamic State extremists - came to the USA from Bangladesh in 2011 on a visa available to certain relatives of US citizens.
The source said the explosion, if it had detonated properly, "could have inflicted a lot more harm".
Ullah was being treated for burns to his hands and abdomen but spoke to investigators from his hospital bed, law enforcement officials said.
The Monday morning explosion occurred in an underground passageway near the Port Authority Bus Terminal, sending commuters scrambling to evacuate a major transit hub just blocks from Times Square.
The pipe had nails stuffed into it, the source said, and could have caused multiple injuries. This official said the police charges would likely be dropped when federal charges are filed.
Rep. Peter King (R-Seaford), who was briefed by the Federal Bureau of Investigation, agreed it appeared Ullah acted alone and had no "red flags", meaning no criminal record or terror affiliations.