The Columbus Bomb Squad returned to Columbus Police Headquarters Wednesday morning, less than 12 hours after an explosion Tuesday night.
Police say it was strictly a precautionary measure after a loud noise was heard inside the building in the 100 block of Marconi Boulevard around 7:30 p.m. Tuesday.
After a thorough search of the building, investigators with the Columbus Division of Fire and Homeland Security discovered the blast came from a battery on a hydraulic ladder in the lobby.
Police Headquarters and the Franklin County Jails, located on South Front Street and Jackson Pike, were placed on lockdown at about 9:30 p.m. People were allowed back inside around 1 a.m.
Columbus fire officials said there were no reports of injuries.
Some streets surrounding police headquarters were closed during the investigation.
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