The man accused of killing UnitedHealthcare's CEO has been charged with murder as an act of terrorism, prosecutors said Tuesday as they worked to bring him to a New York court from a Pennsylvania jail.

Luigi Mangione already was charged with murder in the Dec. 4 killing of Brian Thompson, but the terror allegation is new.

Under New York law, such a charge can be brought when an alleged crime is “intended to intimidate or coerce a civilian population, influence the policies of a unit of government by intimidation or coercion and affect the conduct of a unit of government by murder, assassination or kidnapping.”