Hertha Berlin's team bus has been shot at on the eve of their DFB-Pokal fixture against Arminia Bielefeld.
The bus was fired on by a motorcyclist in the north-west region on Bielefeld while it was travelling from the team hotel to the train station to collect the players.
Only the bus driver was on board at the time, and he escaped injury. The bullet, which was fired from a pistol after the driver had been threatened with a fist, did not penetrate the windscreen.
"It was one shot but we cannot say what the motivation was," Hertha general manager Michael Preetz told German website Sport1. "The bus driver immediately called the police and now the search is on for the culprit. This was an attack on life and limb and not a trivial matter. It's simply madness."
Monday's match is expected to take place as planned.