School security at North Penn High School spotted knives in a student's car early Thursday morning, and immediately notified authorities.
"The police were called, the car was searched and the student was arrested," said Principal Burt Hynes in an exclusive interview with NBC10's Monique Braxton.
Towamencin Twp. investigators say the 18 year old will likely face charges of bringing a weapon onto school property.
"There are no indications of a threat, but its inappropriate to have a weapon on school property and knives are weapons," said Hynes.
"I'm glad that security was vigilant enough to find the situation and that the weapons weren't taken into school, but I'm concerned we weren't at least notified about it," said Michelle DeLoach, parent.
Two students from Pennfield Middle School are also in trouble, after being found with a pellet gun on school property on Thursday.
According to school district policy, all three students could possibly be expelled for one year.