A group of protesters in St. Louis walked on a private street on Sunday to demonstrate outside the mayor's home.
The protesters opposed Mayor Lyda Krewson's decision to publish the names and addresses of people in favor of police reform.
According to CNN, two armed individuals came out of a home near the mayor's house, brandishing weapons as the protesters walked by.
Videos show Mark McCloskey armed with a long rifle, and spouse Patricia McCloskey with a handgun, in a tense standoff lasting roughly ten minutes.
The couple says that while they supported the protesters, they were responding to some of them who threatened their lives.
Police are investigating the incident. On Friday, the mayor apologized on Twitter, saying she didn't mean to hurt anyone.