DURHAM, N.C. (WNCN) — The Durham County Courthouse has resumed operations after a bomb threat closed the building and nearby streets for a couple of hours Friday morning, police say.

Around 9:24 a.m., 911 communications received the threat from an unknown caller toward the courthouse at 510 S. Dillard St., the sheriff’s office said. The building was evacuated and everyone was secure.

Sheriff’s Office K9s, along with the assistance of Durham, Chapel Hill, and RDU police K9s performed a floor-by-floor search of the entire building. Nothing was found and employees and the public were allowed back in just after 11:30 a.m., the Durham County Sheriff’s Office said.

Nearby roads that had been closed because of the police activity involving the threat have reopened too.

A CBS 17 crew on the scene saw dozens of courthouse workers and people with court dates who had waited on the curb outside to get back inside.

“Fortunately, no one was injured in this incident”, said Durham County Sheriff Clarence F. Birkhead. “We must take all threats like this seriously and investigate them fully to ensure the safety of the public. Its a minor inconvenience to make sure no lives are lost.”