Maryland investigators are still looking into the cause of an intense, fast-moving fire at a home in Waldorf, in Charles County, on Sunday morning that killed six people​, including four children.

Investigators are looking into whether smoke detectors were functional and audible after six people were killed in a house fire in Maryland.

A fire ripped through a house in Charles County, Maryland, on Sunday, killing four children and two adults, authorities said. One person managed to escape the blaze reported around 8:40 a.m. at the home in Waldorf,