BRISTOL, Pa. (CBS) – A lock down at the Bristol Borough School District was lifted after police made an arrest in connection to a threat made against the school buildings.

According to information posted to the Bristol Borough School District’s web site, the Bristol Police Department notified the district of the threat and recommended they implement lock-down procedures Thursday.

Sources say the schools were placed in lock-down at about 2:20 p.m. while police investigated a phone threat stating a shooting would occur outside their buildings.

“The students are safe and procedures are being followed,” the school said in a statement on their site.

The schools remained in lock-down passed dismissal time while police investigated the threat.

Officials say at 4:05 p.m., police arrested the person they believe was responsible for the threat. The lock-down was lifted and students were dismissed.

“The students were safe and they conducted themselves in exceptional fashion,” the web site stated.

Parents picking up their children were asked to wait at nearby Grundy Arena Ice Skating Rink until the scene was cleared.