PORTAGE DES SIOUX, Mo. (AP) — A suburban St. Louis volunteer firefighter who was responding to a weekend blaze was found dead in his vehicle in a field.

KMOV-TV reports that the body of 60-year-old Larry Lawhorn of the Orchard Farm Fire Protection District was found early Sunday. Attempts by emergency responders to revive him at the scene were unsuccessful.

Authorities say Lawhorn was driving to a reported structure fire in St. Charles County’s Portage Des Sioux when the vehicle owned by the fire district left the road and ended up in a field. It wasn’t immediately clear Monday why the vehicle left the road.

The district’s chief, Jeremey Hollrah, says Lawhorn was a hardworking, dedicated member of the district, and his death will be mourned by his colleagues and the community.