Fredericksburg (WFVA) -- Fredericksburg Police are investigating a home invasion in the 100 block of Farrell Lane on Tuesday morning at 3. Three adult residents--a mother and son and a male roommate, reported they were tied up and threatened at gunpoint by multiple assailants. The roommate said his 2001 silver Chevrolet Cavalier, had been stolen in Woodbridge around 3 p.m. on Sunday and his cell phone and keys were stolen along with the car. Authorities say the suspects ransacked the house. As the suspects were leaving, a shot was fired which was heard and reported by neighbors along Longstreet Avenue. The suspects were described only as black males wearing red clothing and possibly driving a white SUV. They are considered armed and dangerous.