BOYNTON BEACH, Fla. -

A 13-year-old student at a Boynton Beach charter school pricked 20 other students with a device often used to measure blood sugar levels in diabetics, said police.

Detectives were on scene at The Charter School of Boynton Beach about 12:40 p.m. Tuesday.

The Charter School of Boynton Beach

According to Boynton Beach officials, 20 students were pricked in the neck and face by a medical glucometer, which is used to measure glucose levels. The needle is about an eighth of an inch in length.

According to a probable cause affidavit, the girl accused of pricking the other students was intentionally hit in the face with a ball during physical education class by another student who had been bullying her.

During the bus ride back to school, numerous students reported being pricked by the girl. One ninth-grade boy said that's when he was nicked.

"She poked me right here," said the student." She got me off guard. I had my hands on a bus seat and I turned around and she poked me. And, I turned around and told her not to be playing around with stuff like that cause it could cause sickness."

Police said other students were pricked in the school hallway, in class, and in the bathroom.

None of the 13 and 14-year-old students were injured. Some asked to be taken to nearby hospitals to be checked out.

"The issue at this point is the exposure to this glucometer, where did the glucometer come from," said Stephanie Slater with Boynton Beach police.

It was not immediately known if the girl brought it from home.

Another boy, who said he was pricked, said the girl told him she found it.

"I think she just found it and started poking people," the student said.

The student who investigators believe pricked the other students will be charged with 20 counts of simple battery and culpable negligence, which are misdemeanor charges.

Fire rescue officials recommend parents take their children to their primary care physician to see if they need follow up care as the issue here is exposure to the needle.