TROUTDALE, Ore. (AP) — Authorities say an explosion in a pickup truck killed a man in Troutdale, Oregon. The Multnomah County Sheriff’s Office says police and firefighters responded at 2:19 a.m. Monday to callers reporting a loud explosion and vehicle fire. The Gresham Fire Department extinguished the fire and the sheriff’s office says a person was located inside the burned vehicle. He was pronounced dead at the scene. Special agents from the Bureau of Alcohol Tobacco Firearms and Explosives Seattle branch are assisting the Multnomah County Sheriff’s Office and other agencies in the investigation. Investigators are trying to determine what caused the explosion which is believed to have originated inside the vehicle.