(Vancouver, WA) -- Police are releasing new details about the suspect accused of setting off incendiary devices at ballot boxes in Washington and Oregon. The Portland Police Bureau announced yesterday the suspect is believed to be between 30- and 40-years-old with short or balding hair and was seen pulling up to one of the ballot boxes in a Volvo. Police say he has a "wealth of experience in metal fabrication and welding" and that it's "very possible" that he will strike again at other drop box locations. The suspect is accused of planting incendiary devices at a drop box in Vancouver and a drop box in Portland, both of which exploded into flames on Monday, damaging hundreds of ballots. A third incendiary device placed at a second Vancouver drop box did not go off. The New York Times reports the incendiary devices all had the phrases, "Free Gaza" or "Free Palestine" written on them. It remains unclear whether the bombs were planted by an actual pro-Palestinian activist or if the suspect used the phrasing to try to play on existing divisions in the U.S.