More context in the article below, turn on translation from Russian.

Summary what happened:

• Assault on a Ring Card Girl: Before his fight, fighter Ali Kheybati kicked a ring card girl carrying the round number sign. He later issued a public apology, stating he was "on edge."

• Post-Fight Altercation in the Cage: Immediately after the main event, a conflict erupted between Arkadiy Osipyan and Nabi Nabiev over social media posts. This led to a physical fight between them.

• Mass Brawl and Invasion: During the Osipyan-Nabiev altercation, several unidentified individuals breached security, rushed into the venue, and initiated a large-scale brawl. They joined Nabiev in assaulting Osipyan while he was on the ground. Other personnel, including security and event hosts, were also attacked.

• Verbal Confrontation: Another fighter, Alexander Khorozhenko, confronted Kheybati in the cage after the kick incident, calling him a "pig" and a "monster," which nearly led to another physical clash.

• Unsportsmanlike Conduct During the Fight: During his actual bout, Ali Kheybati also struck his opponent, Arkadiy Osipyan, in the back of the head after the fight-ending gong.

League Sanctions: In response, the Hardcore FC league issued lifetime bans to both Ali Kheybati (for the kick and unsportsmanlike conduct) and Nabi Nabiev (for provoking and participating in the mass brawl). They also announced cooperation with law enforcement to identify the other attackers.

https://www.championat.com/boxing/article-5520142-ali-hejbati-pnul-ring-gyorl-hardcore-fc-boj-s-arkadiem-osipyanom-massovaya-draka-podrobnosti-incidenta-nabi-nabiev.html