Two cats were rescued from a fire that damaged a May Street house late Saturday night.

The fire reported in the ranch house at 138 May St. apparently erupted in the basement area about 10:20 p.m. and then spread upward through the walls, firefighters said.

Smoke was billowing from the house when firefighters arrived on the scene, but occupants had left safely. However, firefighters were told that two pet cats remained inside.

Heavy flames had engulfed a walk-out basement area, breaking through the windows. Firefighters from Engine 2 stretched an 1¾-inch hand line to the rear of the structure and then entered through a door to attack the fire. The crew from Ladder 2 also entered the house to help knock down the fire.

Engine 3's pump operator supplied water from a nearby hydrant to Engine 2. The crew from Engine 3 stretched an 1¾-inch to the first-floor front door and started searching for the animals trapped in the house.

The cats were eventually found and removed safely from the house by firefighters.

There were no injuries at this fire at 138 May Street in Fairfield. The fire is considered accidental but its cause hasn't been determined. Heavy smoke was seen on arrival. Two grandparents, one adult and one teen was rescued along with two cats.

Media: Connecticut Post

Most of the fire was under control in approximately 25 minutes, as firefighters from Engine 1 assisted from the structure's exterior. The building was also checked carbon monoxide and cyanide meters.

Firefighters found that the fire had extended into the first-floor walls at the rear of the house.

The fire was completely extinguished within about an hour.

The blaze is being investigated by both officials from the town's Fire Marshal and Building Department offices.

It has been determined the fire was accidental, but the cause has not yet been determined.