A suspicious package at the School of the Arts in North Charleston kept hundreds of students after school this afternoon.

Students who drove or rode with parents at the School of the Arts and the adjacent Academic Magnet School had to stay about 45 minutes late until it was determined safe for traffic to enter the campus. About 1,800 students are enrolled at the two schools. Buses left on time, according to the school district.

North Charleston police officers were called to the campus near Park Circle about 2:50 p.m. to check out a suspicious package, North Charleston Police Deputy Chief Scott Deckard said.

The package was taken to a safe area away from the building and the schools were placed on administrative lockdown. Fire crews and EMS crews were on standby around the campus, as a long line of cars waited to pick up students.

The Charleston County Bomb Unit inspected the package and found the contents were not a threat, Deckard said.

The lockdown was lifted about 3:45 p.m, and traffic was allowed back on campus.