Fire officials in Brooklyn are calling a two-alarm fire that injured two people early Tuesday suspicious.

The fire started inside of a two-story home on E. 89th Street near Glenwood Road around 3:30 a.m.

The fire started on the first floor and quickly spread to the stairway and second floors of the home.

At least two people suffered minor injuries, and 12 people were being evaluated by medical professionals, however, no serious injuries were reported.

A frozen fire hydrant posed a problem for firefighters who could not immediately access water to extinguish the flames, Deputy Chief Stephen Moro says.  

The fire was put out in about an hour.

The Fire Marshal's Office says it is investigating the fire, which appears to be suspicious in nature due to how quickly it spread.