Deputies attempted to enter the home but could not due to heavy smoke and flames,” the Office of the State Fire Marshal said.

The victims were two adults and four children, according to officials. There were nine residents who lived at the house; one adult escaped and two others were not home at the time of the fire. The origin of the fire remains under investigation, but there was no evidence of a criminal act, the Maryland State Fire Marshal said in a post on X.

Tragic Waldorf Fire Claims Six Lives, Including Four Children DSFMs, @ATFBaltimore, @CCSOMD worked throughout the day Sunday to determine the cause of a devastating Sunday morning fire in Waldorf. More information, including OSFM news release https://t.co/raeHc8KMRr pic.twitter.com/yTjuLPZNoB