Nicki Minaj's concert on Friday night came to an abrupt end after fans had physical altercations and one fan reportedly got maced.
According to TMZ, near the end of the rapper's set in the Concord Pavilion on Friday night, audience began to "push and shove" when things got insane.
One female fan even got pepper sprayed by another person, Nicki stopped the show and invite the girl on stage.
In the video which was shown by ET, Nicki Minaj can be seen a little bit worried for the girl, who got maced. In the video, the rapper was yelling "stop, stop stop" and asking for water to help the injured fan.
One fan, who witnessed the brawl wrote on Twitter that the girl was beaten up by four girls.
The fan wrote, "Still sad about the ratchet concert behavior last night. 4 girls jumped this poor girl & she peed herself when they were beating her up."
Concord Police Department told ET that a lot of concertgoers was treated on the medical area after the incident.
A 22 year man from California was also arrested for assaulting a security guard from the Pavilion.
Lieutenant Tim Runyon said through a statement to ET, "Aside from these few unfortunate events, the concert, and vast majority of the crowd, were not affected."
Nicki Minaj reportedly didn't comment about the pepper spray incident.
But after the show, the rapper posted on Instagram about the show, she wrote, "Sold out show in the Bay Area last night. Adding, "They were more than turnT... Let's just say that. Lol. Can't wait to see u guys again."
While Minaj keeps her mouth shut about the incident, Nicki just recently set the record straight through her Instagram after many fans noted "suspicious curve" accusing her of editing photos before posting them to social media.
