A mysterious chunk of hot metal crashed into a building in Jersey City this morning and the Federal Aviation Administration said an investigation determined it did not come from an aircraft.

The finding prompted speculation that it was a piece of space junk from two satellites that collided over Siberia last week.

The chunk of cast iron the size of a brick smashed through the roof of a moving business about 10 a.m. but injured no one, said Al Smith, the moving company's owner.

Inspectors from the FAA scoured the scene this morning and determined the chunk – which took a reported 30 minutes to cool – did not come from an airplane.

Local police are investigating.

A spokesman for the National Oceanic and Atmospheric Administration could not rule out the possibility that the debris was from a satellite.

The Associated Press contributed to this report.