Comedian Louis C.K. mocked survivors of the mass school shooting in Parkland, Fla., and ridiculed their gun control advocacy, according to a leaked audio tape from a recent performance.

“They testify in front of Congress, these kids? What are they doing?” the comedian says during his comedy set, according to audio posted on Twitter on Sunday by comedy writer Jack Allison.

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“You’re young, you should be crazy, you should be unhinged, not in a suit saying 'I’m here to tell you' — F--- you, ” C.K. continued.

The set continues with C.K. saying that the students didn't suddenly become interesting because they survived a mass shooting.

"You’re not interesting because you went to a high school where kids got shot. Why does that mean I have to listen to you?" he continued while receiving laughs from the audience.

"How does that make you interesting? You didn’t get shot. You pushed some fat kid in the way and now I got to listen to you talking."

i mean he's like a RW comic now. hes milo pic.twitter.com/QYOGI7TrGa — jack allison (@jackallisonLOL) December 30, 2018

Forbes noted that the audio from the comedy set was originally posted on YouTube. It has since been deleted. Multiple people have posted versions of the audio on Twitter.

It remains unclear when and where the comedy set occurred, according to Forbes. Among other things, C.K. also mocked people who use “they/them” pronouns and children with developmental disabilities.

Seventeen students and faculty were killed in February when a gunman opened fire at Marjory Stoneman Douglas High School. The event sparked a nationwide movement from students advocating for gun reform.

Students helped organize the March for Our Lives rally in Washington and organized a get-out-the-vote campaign for the midterm elections. They also held a town hall with members of Congress on CNN and backed pro-gun control candidates in the midterm elections.

C.K. is just coming back to stand-up comedy after admitting in 2017 that accusations of sexual misconduct against him made by five women dating back to 2003 were true. The accusations led to multiple networks to cut ties with the comedian.

He performed his first comedy set since admitting to the accusations in August at the Comedy Cellar in New York.