An MMA event in Florida descended into a chaotic brawl before a man in the crowd fired a gun into the air in what was said to be a bid to try to calm everybody.
Video footage from the event showed people running and ducking for cover when at least one gunshot could be heard in the middle of the disturbance.
"Shameful and pathetic cowardly behavior ruined a great night of fights," said the bare-knuckle fighter Hector Lombard, who attended the show, on Instagram.
It all went down Saturday at a Rize Fighting Championship event at the Bamboo Room in Lake Worth Beach, Florida, as reported by TMZ Sports.
TMZ said punches and chairs were thrown before a man pulled a gun out of a handbag and fired it twice. It added that the Palm Beach County Sheriff's Office was investigating the incident.
Nobody was reported injured by the gunfire. Paramedics, however, arrived to treat those who were affected by the preceding brawl.
TMZ reported that the man fired because he was "apparently hoping the gunshot would scare everyone into behaving."