Subway shooting suspect Frank James has been hit with a federal terror charge by a grand jury.
James, 62, was slapped with that charge and a second count in an indictment unsealed Saturday for allegedly shooting 10 in Brooklyn last month.
He faces a count of carrying out a terrorist attack and other violence against a mass transportation system and its passengers and employees.
James also faces a second count of discharging a firearm during a crime of violence over the April 12 attack in Sunset Park, Brooklyn.
The federal charges have been filed in addition to prior counts filed against James by the southern district of New York. James will be tried on them separately.
The earlier indictment accuses him of terrorist attacks or other violence against a mass transportation system, and carries a life sentence if James is convicted.
Last month's shooting at Sunset Park saw 10 people shot and 23 others injured. All those wounded in the incident survived.
Frank James, pictured, has been charged with a federal terrorism offense over claims he opened fire on a packed subway train in Brooklyn in April, shooting 10 and injuring 23
One man was seen injured in the shooting as officers and a Good Samaritan tried to help him
Frantic commuters were seen trying to run for the exits after a gunman investigators say was James opened fire at a Brooklyn subway station on Tuesday morning
He remains locked-up in a New York City jail ahead of his next court appearance.
Prosecutors say James staged a premeditated attack when he shot ten people and injured others on the northbound N train at around 8.25am on April 12, during rush hour.
James, dressed in a construction worker's vest and helmet, donned a gas mask and rolled smoke grenades into the carriage before opening fire.
Videos from the scene showed hundreds of commuters frantically running for the exits as shots were fired.
A nearly 24-hour long manhunt for James then ensued, with the Bronx-born, Milwaukee-based suspect ultimately arrested while strolling down the street
