By Al Novack

FORT WASHINGTON, Pa. (CBS) — Montgomery County officials say there was a brief lockdown around 8:30 a.m. when school security at Upper Dublin High School thought a student had a rifle in his backpack.

According to the Upper Dublin Township Police Department, the incident began when four students were spotted on a school security video in a hallway with what looked to be a long gun slung over the shoulder of one of the males.

The school was immediately placed on lockdown and police were called to the building and began searching for the four males.

Police were able to track down the four males and an investigation determined that what was believed to be a rifle was actually a large umbrella sticking out of one of the student’s bag.

All four males are currently being interviewed by detectives.

Police say no students were ever in any danger and all precautions were taken without delay.

The lockdown was eventually lifted and police left the scene.

According to a Montgomery County Police radio supervisor, everything is back to normal at the high school.