An investigation is underway to determine what sparked a fire to break out inside a Mississauga building on two separate occasions early Saturday morning.

Firefighters were first called to the building on Tomken Road near Dundas Street at around 5 a.m. after a blaze broke out in a unit.

The fire was then knocked down a short time later, however at around 9 a.m. police say it started up again.

No injuries were reported as a result of either fire, though a number of adjacent units were evacuated as a precaution.

Police say they cannot confirm whether or not the blazes are suspicious.

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