U.S federal prosecutors announced five federal terrorism charges against Akayed Ullah on Tuesday, a day after the Bangladeshi immigrant reportedly set off a pipe bomb in the New York City subway system, injuring himself and three others.

The most serious charges brought against Ullah, 27, were material support for a designated terrorism organization and using weapons of mass destruction, charges that carry a maximum of 20 years to life in prison, respectively.

Ullah was also charged with bombing a place of pubic use, destruction of property by means of fire, and use of a destructive device in furtherance of violence, according to a criminal complaint disclosed Tuesday.

Joon Kim, acting U.S. attorney for the Southern District of New York, announced the charges at a news conference in New York.

The explosion happened about 7:20 a.m. Monday at the Port Authority Bus Terminal subway station.

Kim told reporters that Ullah “selected the location and timing to maximize human casualties.”

Ullah was injured during the blast and taken to a hospital in serious condition with burns on his hands and torso. He remains hospitalized, and Kim said the charges would be formally presented to Ullah at his hospital bedside.

According to the criminal complaint, Ullah admitted to investigators to carrying out the attack in the name of the Islamic State terrorist organization and recounted the process of becoming radicalized and plotting the attack.

“I did it for the Islamic State,” Ullah told interrogators, the complaint alleges.

Ullah, who immigrated to the United States in 2011, also told authorities that he carried out the attack “in part because of the United States government’s policies in, among other places, the Middle East,” according to the criminal complaint.

Police and fire crews block off the streets near the New York Port Authority in New York City, U.S. Dec. 11, 2017 after reports of an explosion.
Police and fire crews block off the streets near the New York Port Authority in New York City, U.S. Dec. 11, 2017 after reports of an explosion.
Ullah’s self-radicalization began as far back as 2014 when he began watching pro-IS videos online, prosecutors allege.One video exhorted IS sympathizers to carry out terror attacks in their homelands if they couldn’t join the caliphate in Syria and Iraq.

About a year ago, according to prosecutors, Ullah began researching online how to build an improved explosive device.

He then started collecting bomb-making materials two to three weeks ago and built the crude device at his apartment in New York’s Brooklyn borough a week before the attack, the authorities said.

On Monday morning, as he headed to the Port Authority station, Ullah posted on his Facebook page, “Trump, you failed to protect your nation.”

William F. Sweeney, the assistant FBI director for the New York Field Office, said Ullah had not registered on the bureau’s radar.