The vice president and his wife were not at their Wilmington Home Saturday night when the shots were fired and there were no reports of injuries, authorities said Sunday.
Secret Service spokesman Robert Hoback said the shots were fired at about 8:25 p.m. Saturday on a public road outside the home's secure perimeter. Secret Service personnel stationed at the top of the long, winding driveway leading to Biden's home heard the shots, saw the vehicle drive past the home at a high rate of speed and flee the scene.
"We heard the shots, four of them," said Young Cho, who lives two houses up from the Bidens. "But next door there is always Secret Service so I wasn't too worried. I feel really safe here. But is was really strange, to hear those kinds of shots next to the vice presidents house."
The shooting occurred just days after the Delaware National Guard increased security at its air base near Wilmington after several incidents in which vehicles approached the main gate before turning around.
The National Guard base is part of a dual-use facility that includes New Castle Airport which has been used by Biden when he travels aboard Air Force Two.
The Bidens spend many weekends at their Delaware home, and while he served in the Senate, Biden frequently made a daily commute from Delaware to Washington by train.