A 25-year-old Keyesport man already charged with bringing a pipe bomb to a Carlyle business is now facing charges in federal court that claim he illegally possessed a gun.

Kyle Matthews was charged in April with bringing a pipe bomb to a business in Carlyle. He was arrested and initially charged in Clinton County with two counts of possessing a bomb and one count of possessing a silencer-type device for a firearm.

Matthews has now been charged in federal court with illegal possession of a machine gun described as a a 9 mm Mark II Sten-type gun.

He also is charged in federal court with possession of an unregistered firearm silencer and possession of an unregistered short-barreled rifle described as an Anderson AM15 semiautomatic .223-caliber rifle.

Following Matthews’ arrest in April, the Clinton County Sheriff’s reported having received several reports of explosions near Matthews’ home in the weeks leading up to his arrest. A search of his home reportedly revealed bomb-making materials and components, along with firearms and ammunition.

The federal charges require Matthews to forfeit the guns if convicted, according to the indictment handed down from a federal grand jury.

Matthews remains in the Clinton County Jail. He will first be tried on the federal charges and then on the Clinton County charges.