A threatening note found in a girls’ restroom at Perry-Lecompton High School prompted local, state and federal law enforcement officers to search all students and teachers entering the school Friday. Metal detectors were used to screen everyone entering the building.

Perry-Lecompton middle and high school students file into the school, where they pass through a metal detector. Kansas State Trooper Dave Myers, back center, greets students. A message warning students not to attend school was found Thursday on the inside of a Perry-Lecompton High School girl's restroom.

The note found Thursday said, “If you don’t want to die, don’t come to school” Friday, said Jefferson County Sheriff Roy Dunnaway. “We’re pretty sure it’s a prank call, but you can’t take a chance on that.”

Officers from the Department of Homeland Security took bomb-sniffing dogs through the school Friday morning. Several police, highway patrol and sheriff’s cars lined the front of the school as students arrived. A fire truck and ambulance also were there, in case anything went wrong.

Friday was the eighth anniversary of the shootings at Columbine High School in Littleton, Colo.

“We don’t know if that has anything to do with it or not,” said Steve Johnston, superintendent of schools. “We find a note scribbled on the bathroom wall; we take appropriate actions.”

Despite the early-morning security, J.B. Elliott, co-principal at the high school, said Friday’s school day was uneventful.

“It was a normal school day as much as possible,” he said. “We had a number of students out today that elected to stay home, which was their choice.”

Otherwise, students had regular classes and even an assembly to end the day, he said.

Elliott said officials will not use metal detectors or search students Monday.

“Our normal security system is you have to buzz the office to come in any door during school hours,” Elliott said. “It’s a safe system anyway.”

However, all classrooms will be locked during school Monday, he said. “The increased security will consist of only one entrance being unlocked before school. And after school starts, all exterior doors will be locked,” Elliott said.

He said officials will continue with those security measures for an undetermined length of time.

“We’re going to monitor that and go back to the normal situation when we deem it secure and safe again,” he said. “That will be an administrative decision between the high school and the middle school here.”