Police find letter claiming responsibility for attack on Borussia Dortmund's bus

[PHOTO: COURTESY]

Police have found a letter containing a claim of responsibility at the scene of the explosion that hit Borussia Dortmund's bus.

The bus was hit by three explosions which occurred while the bus was making its way from the team hotel.

Dortmund Defender Marc Bartra was injured in the incident.

Police chief Gregor Lange said: "This evening, there were three explosions at 7:15 in the area surrounding the hotel in which BVB had been a guest.

"We assume that it was a targeted attack on BVB's team. The services were tasked with securing the crime scene on a large scale.

"We decided at a very early stage not to rule anything out. At the present time, the concrete background for this act is not yet clear.