Fire damages row houses in Chester, Pa.

CHESTER, Pa. (WPVI) -- Firefighters battled a row house fire in Chester, Delaware County.

It broke out at 10:45 a.m. Friday in the 2600 block of Nolan Street and quickly went to two alarms

Video from Chopper 6 HD showed firefighters on the roof of several adjoining row homes.

Smoke was rising from several holes in the roof. Firefighters appeared to be cutting holes to vent the fire.

There were no immediate reports of injuries.

Fire investigators were working to determine the cause.