(Pleasant Home, OR) -- The Multnomah County Sheriff's Office is investigating an explosion early Thursday morning outside of a house in the rural community of Pleasant Home. The device detonated on or in a plastic garbage can. Shrapnel damaged the garbage can and an occupied house a few hundred feet away. No one was injured. Neighbors reported a second explosion, but deputies couldn't find any damage. The federal Bureau of Alcohol, Tobacco, Firearms and Explosives has joined the investigation.