This post has been updated.

A woman in her 80s who had initially escaped a fire in her Greenbelt house Friday night apparently ran back inside to warn others, and died in the blaze, according to a Prince George’s County Fire Department spokesman.

That account was made by several neighbors briefed by investigators, said the spokesman, Mark E. Brady. “The neighbors saw her outside the house, then return,” he said. “She did not come back out.”

Brady said her body was found on the first floor after the fire had been extinguished. The 9 p.m. blaze caused an estimated $50,000 damage to the two-story courtyard house in the first block of Laurel Hill Road, a subdivision off Kennilworth Avenue.

The cause of the fire remains under investigation, and the names of the woman and two others who were injured were not immediately released.

Brady said a man in his 50s jumped from a second-floor window and a woman in her 60s was injured running from the home. Both are being treated at a county hospital. Their injuries were described as serious.

Brady said that the victims include a mother and son, but he had no other details on the occupants.

The fire spread to the second floor and was reaching the attic when firefighters brought it under control, which took about 15 minutes, according to a statement released by the fire department.

Three adults and two children who live in adjoining homes were displaced by the fire but were not injured, according to the statement.

Read the statement from Prince George’s County Fire Department and see photos.