The man, later identified as Thomas J. Wilkie, 46, of Bear, Delaware, had two additional loaded clips of ammunition on his person and 130 more rounds in his vehicle’s trunk, the prosecutor’s office said.
Police acted on a tip from the New Castle Police Department in Delaware that said Wilkie was on his way to the school and may be armed, according to the statement.
The suspect has been charged with second-degree unlawful possession of a weapon, fourth-degree possession of hollow-point bullets and fourth-degree trespassing on school grounds, according to the Union County prosecutor’s office.
Wilkie is being held in the Union County Jail, pending his first hearing Wednesday.
Convictions on second-degree criminal charges are commonly punishable by five to 10 years in state prison, according to officials. Information on his attorney was not immediately available.