Vicksburg Police Officer Derick Smith sprays down a burning pickup after it caught on fire in a three-vehicle crash on Interstate 20 East just past the Big Black River Thursday afternoon. Smith, who was traveling while off-duty, drove up on the fire and worked to extinguish it until firefighters from the Bolton Fire Department arrived. At right is Bolton’s Andrew Arther. Mississippi Highway Safety Patrol Cpl. Odis Easderling said the accident occurred when two trucks, which had been on the shoulder, merged into traffic and a Subaru, driven by Erin Webber of Phoenix, hit them, causing the fire. The Subaru came to a stop in a ditch, and no injuries were reported. Eastbound traffic for four miles was blocked for about two hours.