A 7-year-old boy has been killed when fire engulfed his mobile home near Birmingham, authorities said.

The child was pronounced dead on Wednesday at the scene of the blaze at the Jefferson County residence, Al.com reported.

A call to 911 reported that the boy was trapped inside a bedroom in the home, Sgt. Joni Money said.

Palmerdale firefighters arrived and tried to rescue the boy. Money said attempts to save the child were unsuccessful because of the extent of the fire.

The Alabama State Fire Marshall’s Office is investigating the cause.