3 row houses burn in Camden, N.J.

CAMDEN, N.J. (WPVI) -- Firefighters battled a blaze in Camden, New Jersey where three row houses burned.

The fire broke out around 6:20 a.m. Friday on the 1100 block of Mechanic Street.

Fire crews arrived to find a boarded up vacant house with heavy flames on the second floor.

The blaze quickly spread and caused minor damage to the adjoining houses.

It took crews about forty minutes to get the fire under control.

A firefighter twisted his ankle while in the process of breaking down.

There were no other injuries reported.

So far, there is no word on what sparked the blaze.