German police are investigating a shooting at a watch shop in Cologne on Saturday as possibly having a connection with a recent series of explosions in the city, a police spokesman said. Initial findings suggest that, shortly after 4 am (0200 GMT), an unidentified person fired more than 20 shots from a fully automatic weapon at the facade of the building in the Niehl district, and then fled. Shell casings were found in front of the building, the spokesman said, adding there were no injuries. So far, nothing is known for certain about the background to the incident. However, the public prosecut…