The background is totally open, we can't rule anything out,
we can't rule out a terrorist background at the moment.
This bombing is going to bite the state government. It is still reeling from the disappearance of Metin Kaplan, the Caliph of Cologne, which I discussed weeks ago. Even if the blast is not directly connected to Kaplin's supporters, it will cast more light on security in the state and in Germany.
Other possible explanations that have surfaced. A spokesman for the interior ministry has also suggested that
it could be a conflict between rival Turks.