(CNN) -- German prosecutors have arrested a 28-year-old German-Russian citizen on suspicion of carrying out last week's bomb attack on a bus carrying the Borussia Dortmund soccer team.
The suspect, who was arrested near the southwestern German city of Tuebingen, was staying at the Dortmund team hotel on the day of the attack, according to a statement released by the prosecutor's office.
Three explosive devices shattered windows and injured a player on the bus last Tuesday evening local time as the German squad was en route to its home Champions League match against AS Monaco. The game was postponed to the next day.
The devices, which were hidden behind a hedge, contained pieces of metal and had a reach of 100 meters (109 yards), the federal prosecutor's office said.
Based on the type of detonator and explosive involved, German authorities assumed "terrorist involvement" but the motives were unclear, spokeswoman Frauke Koehler said at the time.
Spanish defender Marc Bartra, 26, suffered injuries to an arm and hand, the team said. Bartra, who has played 29 games in all competitions for Dortmund this season, was treated at the scene and hospitalized.
The team later said Bartra was in surgery for a broken radius -- a bone in the forearm -- and for "bits of debris lodged in his hand." He did not play in the postponed match, which AS Monaco won 3-2.
Developing story - more to come
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