Fire officials are investigating a blaze that destroyed a portable classroom at a Mississauga school early Wednesday.

Mississauga Fire says crews were called to the blaze at Settler's Green Public School, at 5800 Montevideo Rd. near Winston Churchill Boulevard and Battleford Road, shortly before 3 a.m.

A portable classroom at the rear of the school was on fire, officials say.

There are no reports of injuries.

Officials tell CP24 that it's too early to say if the fire is suspicious in nature.

It's not known what kind of impact, if any, the blaze will have on Wednesday's school day.

Tune in to CP24 for updates.