"Unknown men have apparently thrown stones and an incendiary agent into the [newspaper's] archives… from the back yard of the building. Some files are burned there. Luckily no people were in the building at the time," the newspaper stated.
“Two rooms on the lower floors were damaged but the fire was put out quickly,” a police spokesperson said as quoted by AFP.
Hamburger Morgenpost added that two young men who had behaved suspiciously in the area have been arrested and that law enforcers have started an investigation.
The reason of the attack is still unclear, however, following the attack on Charlie Hebdo in Paris, the German newspaper republished caricatures on the Prophet Muhammad.
The incident follows a series of terrorist attacks in France. On Wednesday, 12 people, including two police officers, were killed in a shooting at the office of Charlie Hebdo weekly newspaper, which has been publishing controversial cartoons, including caricatures of the Prophet Muhammad.
The suspected shooters, brothers Said and Cherif Kouachi, were killed by police on Friday, after taking a hostage at an industrial estate in Dammartin-en-Goele, northeast of Paris.