An investigation is underway after a woman was found dead inside a home that caught fire in Eagle Rock Monday morning.

The fire was reported at the one-story home in the 5100 block of North Vincent Avenue just after 3 a.m., Los Angeles Fire Department Capt. Cody Weireter said.

Two people were initially reported as possibly being trapped in the home.

Heavy fire was burning in the rear of the 1,282 square-foot home. The one-story structure was built in 1924, Weireter said.

Nearly 40 firefighters managed to extinguish the blaze in just over 20 minutes.

A man who escaped the home was eventually joined by his wife, who was rescued by firefighters, spokesperson Brian Humphrey stated.

The two, who are believed to be in their 70s, were treated at the scene but were not taken to a hospital.

The home was equipped with fire alarms, which alerted the couple to the blaze, Weireter said.

As the flames were being extinguished, crews found one person, described as a woman in her 50s, deceased within the residence.

The victim has not been identified and her relationship to the couple was unclear.

No other injuries were reported in the incident.

The cause of the fire is under investigation.