It was not clear whether the individual had anything to do with the shooting minutes earlier.
It was also not clear Sunday whether any of the gunshots hit Biden’s home, which is in Greenville, a small, affluent suburb of Wilmington. After the shooting, Secret Service agents launched an extensive search of the home’s exterior to determine whether the building had been struck, according to the Secret Service.
There was no immediate information about a possible motive. The vice president and his wife, Jill Biden, have been briefed on the incident, according to the Secret Service.
“The Secret Service is working closely with the New Castle County Police on investigating this incident,” according to a statement released by the Secret Service.
A Biden spokeswoman declined to comment, referring all questions to the Secret Service.
Andrews said Sunday that the New Castle County Police are investigating the incident with the FBI’s division in Baltimore. He said that after police responded at 8:28 p.m. to a report of shots near Biden’s home, officers heard more gunshots when they arrived.
Andrews said police learned there was a report of more shots fired nearby at the Hoopes Reservoir, which is more than a mile from the initial security perimeter near Biden’s home in a heavily wooded area. He said that it is not clear whether the two reports of shots fired are linked.
Carol Leonnig contributed to this report.