The Harford County Circuit Courthouse on Bel Air's Main Street received an unspecified bomb threat Thursday morning that the sheriff's office said proved to be unfounded.

A call came in to one of the judge's chambers at about 8:25 a.m. from a male voice and mentioned explosives in the courthouse, Lt. James Eyler of the sheriff's office said Thursday afternoon.

"The threat was not specific. It did not list a date or a time," Eyler said. "They determined it was a non-credible threat because it was not specific."

Sheriff's deputies searched the courthouse, but did not evacuate the building. Everyone did, however, end up leaving the building for a reason unrelated to the bomb threat.

"While they were searching, they located a faulty smoke detector and the smoke detector went off and the building was evacuated," Eyler said.

Eyler said the courthouse does occasionally get bomb threats, "especially on a specific trial date because they [defendants] don't want to go to trial."

Thursday's threat, he added, "was pretty much uneventful."