More than 800 mosques in Germany have been the targets of threats and attacks since 2014, however, the crimes were not properly investigated in the majority of cases, according to Brandeilig, an initiative by rights group FAIR International.
The group founded Germany's first reporting center for attacks on mosques and recorded nearly 840 incidents of attacks, vandalism and threats between 2014 and 2022.
A detailed analysis of the crimes in 2018 revealed that perpetrators remained unidentified in most of the cases, fueling further attacks against Muslim worship sites by neo-Nazis or left-wing extremists.
"In general, the clearance rate for mosque attacks can be considered very low," the group said in a recent report.
Among the 120 attacks recorded against mosques in 2018, the perpetrators were identified in only nine cases.
"This rate is a cause for concern," Brandeilig's experts stressed, pointing out that in at least 20 cases, which included arson attacks, suspects intended to cause death or great bodily harm.
"In general, the police officers arrived on the scene very quickly and immediately started the investigation. Nevertheless, almost none of the incidents could be solved until today," the experts said.
Left-wing extremists and followers of the PKK terror group were behind several attacks targeting mosques, while the majority of them were committed by right-wing extremists or neo-Nazi groups, according to the report.