DARIEN -- Noroton Heights firefighters backed by residents brandishing fire extinguishers and a garden hose squelched a porch fire at a two-story duplex on Park Lane Sunday evening, Noroton Heights Fire Department Chief Ron Riolo said.

No one was injured in the fire, and residents of both units of the two-story structure were able to remain in their home, Riolo said.

More than 20 firefighters responded to the fire at 13 and 15 Park Lane on a blaze that was reported just after 5 p.m. as a basement fire, Riolo said.

On arrival, firefighters found residents had already put out most of the flames by roughly 5:10 p.m., Riolo said.

"I'm very glad that the residents did what they did because it could have been bad," Riolo said.

Firefighters broke a hole through the porch floor boards to extinguish any remaining flames or smoldering embers, Riolo said.

The cause and origin of the fire remains under investigation, Riolo said.

Riolo said the neighbors' quick action was fortunate, as it prevented the fire from reaching the walls of the home, which has a balloon frame construction that might have allowed flames to advance quickly.

"We were here in about two minutes after the call came in and they had already done a lot of the work," Riolo said.