Manheim Central High photo

Manheim Central High School is seen April 12, 2012.

Police are looking for the source of a bomb threat made to Manheim Central High School on Friday morning.

The threat, made by a call to the district office, prompted an evacuation of students and staff from the high school around 9 a.m., according to the Lancaster County district attorney's office.

The call indicated a bomb was at the high school, 400 East Adele Ave.

Students and staff were "moved safely" to the middle school, according to a notice on the district's website. They went back to the high school at 10:30 a.m. after police searched the building and determined it was safe, according to district superintendent Peter Aiken.

Manheim Borough police were assisted by K-9s from the Lancaster County Sheriff's office and Lancaster city police, as well as Northern Lancaster County Regional police, the district attorney's office said.

"We received an outside threat today," Aiken told LNP. "We're going to take every precaution to be safe."

Manheim Borough police are leading the investigation. They were following multiple leads Friday, according to the district attorney's office, which is assisting.

Anyone with information is asked to call police at 717-665-2481.