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WILLIAMSBURG, Va. (WAVY) - An investigation into a detonated improvised explosive device is underway in Williamsburg.

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Investigators responded to a parking lot in Colonial Williamsburg, at South Boundary Street and Francis Street, at around 5 p.m. Thursday after receiving a call for a vehicle fire.

When units arrived, they learned an explosion was confirmed as a detonation of an improvised explosive device. The device was located outside of a car parked in the lot.

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Major Greg Riley with the Williamsburg Police Department said no one was been hurt and there was no damage to any of the vehicles in the parking lot.

Williamsburg Police say that units with Williamsburg Police, Williamsburg Fire, Colonial Williamsburg Public Safety, Newport News Police, Virginia State Police, the AFI and the FBI assisted.

Officers believe it was set off intentionally but said later Friday it was an isolated incident.

The section of Francis St. between South Boundary Street and South Henry was closed to vehicle and pedestrian traffic during the investigation.

Police sent a message Friday morning to the William & Mary community: