BAYONNE, New Jersey (AP) – A hunk of metal that crashed through the roof of a New Jersey home has NASA, Federal Aviation Administration and even U.S. defense officials curious.

A man was watching television Tuesday when he heard a crash and saw a cloud of dust. In the next room, he found a hunk of gray metal, 3.5 inches (8.89 centimeters) by 5 inches (12.7 centimeters), with two hexagonal holes.

Experts say the chunk is manmade, but no one can say where it came from.

"It doesn't look very 'space-y,''' said Henry Kline, a spokesman for NASA's Jet Propulsion Laboratory in California. "It's obviously made for something ... But we wouldn't know what to do with it.''

FAA officials said it would not have fallen from a plane headed into or out of nearby Newark Liberty International Airport.

U.S. Air Force Major Costas Leonidou at the Pentagon said he could not identify the fallen object, either. "It could be Air Force, Navy, Marines, commercial. It could be anything,'' he said.