An unknown assailant sprayed offensive grafitti on the walls of an Alevi house of worship in Bursa on Thursday, media reported.

The graffiti read “the president of the Kestel Cemevi is pro-PKK,” and “Kestel is abound in PKK supporters.” The assailant also left a number of leaflets around the cemevi that had the following message on it: “Happy May 3 Turks Day.”

After the attack, cemevi officials notified police, who have then launched an investigation to find the assailant.