A.B. Quintanilla posts apology after viral rant at San Antonio's Tejano Explosion

While performing in San Antonio Saturday night, A.B. Quintanilla, brother of Tejano music legend Selena Quintanilla-Pérez, went on a rant that has since gone viral. Quintanilla then posted an apology video on social media, which has since been deleted.

Here's what we know.

A.B. Quintanilla's apology after rant

Musician A.B. Quintanilla posted a nearly six-minute apology video on his Instagram page, but it has since been deleted. In the video, Quintanilla explained his behavior was a result of not taking his medication.

Three weeks before, Quintanilla said a doctor suggested he get tested for cancer. He had to pause some of his prescribed medication so it wouldn't interfere with the biopsy results.

“I broke last night. I said things that I don’t mean, that I don’t feel in my heart. From the bottom of my heart, I’d like to apologize to everybody,” said Quintanilla.

In the video, Quintanilla said he has not been diagnosed with any form of cancer.

Video shows A.B. Quintanilla's rant at Tejano Explosion concert

Tejano music star A.B. Quintanilla exploded at fans during his Tejano Explosion performance in San Antonio Saturday night.

In a multi-video series, TikTok user @eat_teach_repeat posted A.B.'s rant.

"Like somebody put a gun to your head and forced you to be here tonight," Quintanilla was recorded saying. "And that feels horrible as a musician to work so f***ing hard over all these years to bring you hits, and you guys come here, and you can’t even f***ing raise your hands to f***ing clap or be happy, man."

Quintanilla's rant was met by boos and retorts from the crowd. The musician vowed to never perform in his hometown again.

"This is my last performance for you, I’ll ever do," he said. "I’m just being truthful with you. I traveled all the way from Las Vegas, received love all the way from over there. I come to my hometown in Texas, San Antonio, and I got no f***ing love over here, man. That’s not cool."

As if that weren't enough, Quintanilla made a dig at the Dallas Cowboys football team.

"Just like you support the Dallas Cowboys, who lose every f****** year."

A.B. Quintanilla III y Los Kumbia All Starz were the final act of Tejano Explosion, a popular Fiesta event in San Antonio which lasted from April 18 to April 27.

Who is A.B. Quintanilla?

A.B. Quintanilla is a Tejano musician, songwriter and record producer. He is also known as the brother of the late Selena Quintanilla-Pérez.

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Quintanilla has opened up about his struggles with mental health that surfaced after his sister was fatally shot in 1995.

This article originally appeared on Austin American-Statesman: A.B. Quintanilla, brother of Selena, goes viral for San Antonio rant