Civil rights leaders and music stars are joining together to try and put an end to the knockout game in New York.

Reverend Al Sharpton, hip-hop mogul Russell Simmons and others have joined together for a series of social media announcements aimed at ending the violent game where a group of youths videotape a member of their gang striking a random stranger with the intent of knocking them out with one punch.

“The knockout game is not a game,” Rev. Sharpton said in a YouTube video. “It is vicious. It is ugly. It must be stopped.”

Sharpton then released a statement saying the game cannot be tolerated.

“These kids are targeting innocent people, and in many cases specifically targeting Jewish folks. We would not be silent if it were the other way around, and we will not be silent now. This behavior is racist, period. And we will not tolerate it,” he wrote.

Russell Simmons said in his video that those who participate in the game are cowards.

“How come you all want to hit people that look like they’ve got on devotional clothing and might not hit you back? Why don’t you hit somebody that might hit you back?” Simmons said in a video.

A newly elected New York Councilwoman wrote in an open letter that said many of her black constituents feel threatened by the growth of the Jewish community and that could be contributing to the increase in violence.