A Medford man faces federal charges after investigators say they recovered nine firearms and homemade silencers from his residence. Prosecutors say the case later expanded to include alleged threats against a witness and an explosive device detonated in a vehicle at the witness’s home.

A pre-dawn explosion in Ashland prompted a large multi-agency response and led to the arrest of a 32-year-old man. Investigators say an explosive device detonated inside a parked vehicle, and a potential secondary device prompted officials to secure the area and advise nearby residents to shelter in place before bomb technicians cleared the scene.