The incident occurred at the Koca Sinan Camii mosque in the German capital shortly after 2am on Sunday. Firefighters were sent to the scene after receiving a call that the building had erupted in flames, according to AFP. The blaze was under control by 3am, and no one was injured.

The fire is being treated as a suspected arson attack by authorities. “According to current findings, a politically motivated offense is assumed…,” a police spokesman said, according to German tabloid BZ Berlin.

Witnesses told the news outlet that three young men in hoodies smashed the front door of the mosque before throwing an object into the building. The men then reportedly fled.

The mosque belongs to the Turkish-Islamic Union for Religious Affairs, one of the largest Islamic organizations in Germany. The mosque addressed the incident on its Facebook page, saying that “an arson attack” had taken place. “Most of the rooms of our mosque are largely unusable,” it wrote, calling the incident “unacceptable” and including photos of the damage.