The Ontario Fire Marshal has been called in to investigate after firefighters found a body inside a rowhouse unit in Bells Corners after a fire ripped through the unit.

The fire started in an end unit of the eight-unit, two-storey rowhouse at 421 Moodie Dr. about 10:50 a.m. Thursday. It caused two upper floors to collapse into the basement of the unit.

Firefighters battled a blaze at 421 Moodie Dr. on Thursday. (Danny Globerman/CBC) The other seven units sustained smoke damage, fire officials said.

Police had no further information on the identity of the person found dead.

The Salvation Army and the Red Cross were called to provide assistance to the other residents affected by the fire.

Those residents likely would not be able to return home on Thursday night after the electricity was shut off, according to fire officials.

More than 50 firefighters were battling the blaze, which caused an estimated $400,000 damage.

Moodie Drive was closed in both directions at the scene, which is close to Robertson Road near Hadley Circle. All southbound lanes and one northbound lane reopened just before 6 p.m.