Mysterious burnt object found in US, picture surfaces as police say 'They're not telling us'. A resident in US discovered a mysterious metallic object with a burnt underbelly in his field last week, which police described as "foreign debris". Authorities described it as a "large, metallic object, approximately 11 feet in diameter, presumably a space object". Stevens County Sheriff Jason Dingman said, "I think somebody way up...knows what this...is, but they're not even telling us.".