A Richmond police sergeant is under investigation after he posted a tweet Thursday that said he would “go at (hackers) with both guns.”

Angry Facebook users posted hundreds of responses on the Richmond Police Department’s Facebook page late Monday after two well-followed Twitter accounts, @AnonyOps and @YourAnonNews, spread the tweet from Sgt. Mike Rood.

@Fan1UFC: “@danawhite get those hacking (expletive). I’m a cop in the bay area CA. I would go at them with both guns!”

Rood wrote the tweet in support of Dana White, the president of Ultimate Fighting Championship, a mixed martial arts organization. White has been vocal in his support of two anti-piracy bills, Stop Online Piracy Act (SOPA) and Protect IP Act (PIPA). In response, members of the hacker group Anonymous hacked the UFC website over the weeekend and released White’s Social Security number, cell phone number and address.

Police spokeswoman Lt. Bisa French said the department is aware of the situation and that Rood is under investigation to see if any policies were violated. Rood’s Twitter account has since been deleted.

Many of the posts on the department’s Facebook page appear to be copies of a form letter, which asks for the department to discipline Rood for the perceived threat.

“I fear for the safety of the citizens of Richmond after seeing such irresponsible action displayed by one of its very own police officers,” the posts say.