The Washington County Special Response Team was called to the Leitersburg Haunted House Friday night to investigate a substance that was apparently thrown from a passing vehicle, authorities said.
Leitersburg Volunteer Fire Co. Chief Milton Bloom III said the substance created a cloud of gas, but it was determined to be not hazardous. He said tests conducted by the Special Response Team determined the unknown substance was an acid-based agent.
Bloom said two vehicles drove past the haunted house, in the Old Leitersburg School House on Leitersburg-Smithsburg Road, shortly before 11 p.m. Someone threw a bottle out the window of one of the vehicles and it hit the asphalt road about 50 yards from the haunted house, emitting some type of gas which then dissipated.
The haunted house was not shut down because the substance was believed to pose no threat, Bloom said.
People were waiting in line to go inside as the Special Response Team was leaving the scene about 11:30 p.m.