Police are investigating after a man started chanting “kill Muslims” at a group of Muslims in downtown Grand Rapids, FOX-17 reports.

The whole thing happened near Rosa Parks Circle in Downtown Grand Rapids Sunday afternoon, and a bystander caught part of the incident on video and posted to Facebook. (Note: the language contained in the video is not for little ears and NSFW.)

Candy Valenzuela via Facebook.

In the video, we see a man yelling expletives at a group of Muslims (according to the person who posted the video). He's heard yelling things such as "Kill Muslims!" and "Kill 'em all!" Some people also claim that towards the end of the video he is chanting "Trump!" over and over again.

FOX-17 reports that police were called by a witness who said a group of protesters had pushed a man down.