Students at Oak Grove High School were evacuated Wednesday afternoon and the building was in lockdown after the district received a bomb threat through email, though law enforcement officials found no explosive device.

Linda Williams, assistant superintendent of the Oak Grove School District, said the district received information about noon of an alleged explosive device in the high school gymnasium.

“It was taken seriously, and we evacuated the high school,” Williams said, adding that students were sent to district’s FEMA safe room. After the Oak Grove Police Department was notified, it called the Jackson County Sheriff’s Office, and that department employed bomb-sniffing dogs.

“They thoroughly searched the area, and the other buildings in the district also were searched,” Williams said. At about 1:45 p.m. the district received the all-clear for students to return, she said.

“We turned all the information over to the police, and we’re pretty confident we’ll be able to track the source of the email,” Williams said.