German federal prosecutors have confirmed that a suspect has been detained, in relation to the three explosions that hit the Borussia Dortmund team bus on Tuesday night.
Speaking at a news conference on Wednesday, spokesman Frauke Kohler, also revealed that a letter was discovered near the scene of the incident.
She said two suspects from the “Islamist spectrum” were being investigated.
“It is to be assumed that there is a terror background,” a Federal Prosecutor’s office statement said.
“The motives are yet unclear.
“There were three claims of responsibility near the scene of the attack. They all had the same content, and an Islamist background can’t be ruled out at this point.
“Two suspects from the Islamist scene have been in the focus of our investigations. We raided their flats, and one has been detained temporarily.
“It is currently being considered to issue an arrest warrant.”