GLENVIEW, Ill. — Friday classes are canceled at Glenbrook South High School after a fire on Thursday afternoon.

The school said the accidental fire was reported shortly before dismissal around 3 p.m. and the fire alarm was activated.

The school said no homework will be due until classes resume and AP exams will be rescheduled.

No injuries were reported, according to public safety officials and the school.

The school said no one is allowed back in the building until an all-clear has been given by the fire department. They said anyone who tries to go into the building will be turned away.

All home athletic events, except for the men’s lacrosse game and Thursday night’s band concert have been canceled.

The school said students’ items will stay where they left them.