Residents across several European countries were captivated by a spectacular light show in the early hours Wednesday, as bright lights with long fiery tails streaked across the sky.

The pyrotechnics were in fact caused by a Space X Falcon 9 rocket re-entering the Earth's atmosphere. There are reports of sightings in Denmark, Sweden and England. Pieces of the rocket then crashed into Poland and, experts say, may also have landed in Ukraine.