SULLIVAN COUNTY, Tenn. (WJHL) – West Ridge High School was evacuated Thursday after a potential threat, Sullivan County Director of Schools Chuck Carter informed News Channel 11.

According to Carter, the Sullivan County Sheriff’s Office was notified of the potential threat just after 10 a.m., and students were moved out of the building according to protocol.

An in-depth search of the school was conducted, and Carter said K-9 units from law enforcement agencies in Sullivan County, Kingsport, Greene County and Bristol, Tennessee were used to “sweep the grounds.”

The Kingsport Police Department Bomb Squad was called after a backpack that required further inspection was identified, Carter said in a statement. The bomb squad was finished inspecting the backpack around 2 p.m., and no threat was found.

West Ridge students were then moved back into the school, and school was dismissed at 2:30 p.m.

The school district had previously reported Thursday morning that no students had been injured during the evacuation.

“We want to send our sincere thanks to the Sullivan County Sheriff’s Office and first responders for their quick and thorough response to today’s event at West Ridge,” Carter wrote. “I also want to say thank you to the families and students for their patience shown as we worked to ensure the safety of everyone. Additionally, thank you to the administrators, faculty, and staff at West Ridge.”