ADAMS TWP — Township police on Tuesday arrested a Mars High School student for allegedly making a bomb threat in the building the day before.

Township police Chief Bill Westerman said the investigation led to the arrest of the girl, who was not identified.

Further information about the girl, including her age, was unavailable.

Westerman said the case will be handled by Butler County Juvenile Court.

The high school was evacuated Monday afternoon after a written note was found attached to a stall door in the girls’ locker room.

Superintendent William Pettigrew said the school reopened Tuesday morning following building searches Monday afternoon and Tuesday morning in which no explosives were found.

Pettigrew said the second search was a precautionary measure before students entered the building again.

The note, which was signed with the letter A, reportedly stated: “Good luck with the bomb. Have fun Mars High.”