Brisbane unit fire 'deliberately lit'

Police are speaking to a man after a fire broke out on the second floor of a Brisbane apartment.

It is believed one person suffered minor injuries as a result of the blaze, and is being treated by ambulance crews.

Fire crews are on scene at Harries Street in Coorparoo.

It is not yet known if there are any occupants of the address.

A secondary search for occupants was underway a short time ago.

The cause is yet to be determined, but authorities believe it was deliberately lit.