Three explosions in the vicinity of Borussia Dortmund's team bus caused the club's Champions League quarter-final first leg against Monaco to be postponed and left one person injured.
Tuesday night's match, scheduled to be held at Dortmund's Signal Iduna Park, was subsequently postponed until 5.45pm BST on Wednesday.
Marc Barta, the Dortmund defender, suffered minor injuries in the incident and is being treated in hospital. The cause of the explosions is yet to be confirmed.
A statement by local police read: “In the run-up to the Champions League match of the BVB against the AS Monaco, there was an explosion near the BVB team team bus shortly after 7pm.”
“The event location is Wittbräuckerstraße / Schirrmannweg in Dortmund-Höchsten. According to current knowledge the disks of the bus (whole or partial) were broken and one person was injured.
“It is not yet possible to say exactly what the explosion was or exactly where something exploded.”
North Rhine-Westphalia police spokesman Gunnar Wortmann subsequently confirmed that a total of three explosions had occurred near the team bus and that "there was one player injured inside and damage to a window."
Dortmund's official Twitter account broke news of the incident, tweeting: “At our bus departure, an incident has occurred. One person was injured. More information to follow.”
The club later confirmed: “A bomb exploded at the team bus next to the hotel. The players are safe. There is no danger at the stadium”.