Three children were found stabbed in a burning building in Chicago’s Logan Square neighborhood on the Fourth of July, sources told NBC Chicago. The blaze was first reported around 10 a.m. local time Friday in the 3600 block of West Palmer.

A source close to the investigation said the call came into 911 from a family member, who said the children's mother "snapped" and stabbed the children before starting the fire.

A 4-year-old boy died after a woman allegedly stabbed multiple people inside a Logan Square residence before setting the home on fire Friday morning, police said.