Police are treating a fire at Ilkeston’s former South East Derbyshire College as arson.
Four fire crews from Ilkeston, Long Eaton, Heanor and Highfields attended the scene in Cavendish Road at about 7.15pm on Wednesday (October 30).
The blaze started in the former sports hall.
Fire service investigators believe it was started deliberately and reported it to police, who are checking CCTV in the area.
Firefighters spent more than two hours battling the blaze.