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Black Friday turned violent for a group of shoppers at a crowded mall in Modesto when a fight broke out near a JCPenney store on Thanksgiving night.

The incident occurred at the Vintage Faire Mall while the Black Friday shopping rush was well underway, videos posted to Twitter and YouTube showed.

Marco Sebastian, who witnessed the brawl, told CNN he was hanging out at the mall around midnight when he witnessed a large group of people fighting during a late night of shopping.

Sebastian didn’t know what exactly started the fight, but said eventually, security responded and stopped the fighting.

Police were not called to the scene, and there were no reports of injuries connected to the incident, the Modesto Bee reported.

Black Friday is one of the biggest shopping days of the year, but it has expanded in recent years. The annual retail mega event began in many stores on Thanksgiving evening — including the Vintage Faire Mall, which opened Thursday night — and will continue into the weekend.