Unidentified assailants desecrated a mosque in Munster, western Germany late July 16.
The assailants tore pages of a copy of Quran at Barbaros Mosque of the Turkish Islamic Union for Religious Affairs (DITIB).
DITIB representative Sebahattin Çiğdem said on Wednesday an investigation into last night's attack was launched after they saw a copy of Quran ripped up inside the mosque and called the police Wednesday morning.
He recalled, "our mosque had also been attacked on January 22, 2018. PKK terrorist organization supporters sprayed political messages on the doors and windows of the mosque.''
In the last 10 days in Germany, six DITIB mosques, as well as an Arab mosque, were attacked.
Germany has witnessed growing Islamophobia and hatred of migrants in recent years triggered by the far-right parties, which have exploited fears over the refugee crisis and terrorism.
Police recorded 813 hate crimes against Muslims last year. At least 54 Muslims were injured in those attacks carried out mostly by far-right extremists.