Seattle police announced Tuesday that a 15-year-old arrested in connection with a shooting at a food festival near the Space Needle over the weekend was found with a ghost gun. The weapon, a 9 mm firearm manufactured by the now-defunct company Polymer80, a former leading producer of ghost gun parts, was equipped with an extended magazine, according to Police Chief Shon Barnes.

During a news conference, Barnes stated that investigators also recovered two other firearms and 14 shell casings from weapons of two different calibers at the scene. Ghost guns, which are privately manufactured firearms that do not have serial numbers, are often acquired without undergoing background checks. Law enforcement officials have noted an increasing prevalence of these untraceable firearms in violent crimes across the United States.