A mother and her 4-year-old son remain hospitalized after the two were pulled from their burning mobile home by a Skowhegan police officer Friday night.

Andrea Curtis, 24, and her son, Tyler Curtis-Benson, suffered serious injuries in the fire on North Avenue.

The mother and son were rescued from the blaze by Skowhegan police officer Tim Williams.

Steven McCausland, spokesman for the Maine Department of Public Safety, said Monday morning that the boy's condition is improving, but "that is not the cause for his mother."

The Portland Press Herald reported Sunday night that Andrea Curtis remained in critical condition at Maine Medical Center in Portland.

The boy is being treated at Shriners Hospital for Children in Boston.

McCausland said the cause of the fire is still under investigation.