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.
The prosecutor's office says the suspect had bought a considerable number of team stock in hopes of making a substantial profit if their value had fallen.
"A significant share drop could have been expected if a player had been seriously injured or even killed as a result of the attack," the statement says.
According to the prosecutor's office, 15,000 shares of Dortmund stock were purchased using the IP address of team hotel the day of the attack.
Based on the type of detonator and explosive involved, German authorities had assumed "terrorist involvement," 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.