Anyone want to take a wild guess at who the culprits are?

Update:

Via NY Post:

Empty offices belonging to the German newspaper Hamburger Morgenpost was struck by an arson attack and two suspects were arrested, police told Reuters on Sunday. No one was inside the Hamberg-based offices when an incendiary device was thrown inside, causing a small fire. The publication was one of several that has reprinted anti-Muslim cartoons first published by Charlie Hebdro.

Papers who published the cartoons are now getting police protection in Germany.