Translated from Dutch regional broadcasting organisation RTV Utrecht today:
Similar to what French rascists did earlier to a mosque.
The mosque board says it has informed the police. Camera images have also been provided to the police, who are now investigating.
You can also see pictures of the smeared mosque on Twitter.
“Of course it is terrible that this has happened, but let’s not panic unnecessarily and let the police do their work,” writes the mosque executive on Facebook.