A vehicle fire in an area thick with brush threatened nearby buildings in St. George Wednesday evening. At 7:20 p.m., firefighters and police were dispatched to the fire involving a pickup truck along the Virgin River just east of Smith’s Marketplace on Mall Drive. Responding firefighters observed thick, heavy black smoke coming from the area and requested additional engines and brush trucks to be dispatched to the area. The Washington City Fire Department was also called in to assist as the blaze spread from the pickup truck to surrounding brush and vegetation with an apartment complex and other business structures located nearby. Fire crews arrived to find the truck fully involved in fire and were soon confronted with what sounded like small explosions going off as ammunition inside the pickup began to explode from the heat of the blaze.