The owner of a Norman, Oklahoma tattoo parlor has caused a social media stir after announcing he won’t serve police officers. 

On Friday, Norman Tattoo owner Frank Robinson posted to Facebook that his tattoo shop would offer a 25 percent discount to those wearing a motorcycle club patch and riding a motorcycle, but that police would not be served. The post has since gone viral, having been shared more than 1,000 times.

Robinson followed the post with a sign on his door that referred to a deadly biker gang brawl that took place May 17 in Waco, Texas.

“In light of recent events in Waco, TX and other places, people wearing the insignia/patches of police departments are not welcome on these premises,” the sign read.

Nine died from gunshot wounds and 18 were hospitalized after the Waco, Texas melee, which was apparently sparked by an altercation between rival biker gangs. More than 170 people were arrested. As an investigation into the incident continues, police have denied claims that officers were involved in starting the violence.

“The fact that the police are admittedly in possession of video of the entire event, yet have not released it, is more than a little frightening,” Robinson said.

Robinson said he is asking police to avoid his business because “they seem to bring chaos and intimidation everywhere they go.”

Norman Police Chief Tom Easley was asked Tuesday if his department had a response. Easley said he would “absolutely not comment on the situation.”

The post has resulted in backlash for Robinson, who says he’s received threatening phone calls over the social media post. 

“Had I said I was unwilling to serve gays in my business, I’d probably have the full support of the community,” Robinson said. “But instead, I said police are not welcome, and I’ve spent all day being threatened and insulted by people hiding behind telephone calls and Facebook messages.” 

Robinson said he was not expecting the response his Facebook post has garnered.

“I kinda just threw the ‘no police’ thing onto the end of a Facebook post offering a discount for MC patchholders when they ride here for a tattoo,” Robinson told the Norman (Okla.) Transcript. “I know the vast, overwhelming majority of MC members, myself included, are mostly law abiding, hard-working, tax paying people and don’t deserve the bad rap we are getting. I offered that discount just to encourage other bikers to get out and ride, don’t be afraid of the police or anyone else (and) just ride and fly the patch and be proud of who they are.”

Kirby writes for the Norman (Okla.) Transcript.