HAVERHILL — A porch fire that spread into a house at 3 Devonshire Lane displaced at least three people Monday afternoon.

No injuries were reported, according to Deputy Chief Jeff Akstin. The cause of the fire is being investigated by Lt. Michael Picard.

The fire was reported at around 5 p.m. Engine 4, from the Bradford station, was the first to arrive. Firefighters extinguished the blaze within 15 minutes and kept it from doing more serious damage to the single-family, wood frame house, Akstin said.

The fire started on a porch attached to the rear and side of the house. Akstin estimated the damage at $20,000.

Picard told three residents of the home, a man and two women, that they could enter the building to retrieve personal belongings but he advised them against staying too long because of unsafe conditions.

The residents declined to talk to The Eagle-Tribune.

Firefighters battled the blaze in 75-degree heat. A Trinity ambulance brought bottles of water to ensure the firefighters were adequately hydrated, according to Deputy Chief Eric Tarpy.

Besides Engine 4, Engines 1, 2, 3, 8 and 9 and Ladder 1 went to the scene. The engines drew water from a nearby hydrant at Lincolnshire Drive and Devonshire Lane.

Lawrence Engine 2, Methuen Engine 6, a Groveland pumper, a Salem, New Hampshire tower truck and crews from the Ayers Village and Rocks village volunteer companies provided station coverage.

Although no one was hurt, three Trinity ambulances responded as a precaution.