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Kevin Barnett, the comedian behind Fox comedy series “Rel,” has died while on vacation in Mexico of unknown causes. He was 32.

Barnett’s New York City-based comedy career was just taking off at the time of his death, having recently executive produced and co-created Fox TV series “Rel” alongside comedians Lil Rel Howery and Josh Rabinowitz.

Barnett and Rabinowitz had previously been head writers and appeared in TruTV’s “Friends of the People,” and as writer-producers on “The Carmichael Show.”

The up-and-coming comedian served as writer on the “House-sitting” episode of “Broad City.” He also appeared on HBO’s “Funny as Hell” and in Chris Rock’s “Top Five.”

He co-hosted podcast “Round Table of Gentlemen” with Ben Kissel for Last Podcast Network, which tweeted, “It’s with a heavy heart we inform you of the passing of Kevin Barnett.”

Howery paid tribute to Barnett with an Instagram post on Wednesday. “Thank you for the last 6 years of helping make my dreams come true man,” he wrote, in part.

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This is my favorite pic of me and @fatboybarnett but in all honesty this dude was brilliant and was a very hard worker… I’m thankful for him and Josh always putting in the extra hours to make sure every script was on point… Kevin was somebody I would always give shit to because it was fun and funny plus he had the same crazy sense of humor… Over the years we would have some hysterical dope convos and exchange crazy stories… I can’t stop crying on this plane it’s really starting to hit me that he is actually gone… At 32 he accomplished so much in this business and was respected by many… Rest In Peace my brother and my friend… Thank you for the last 6 years of helping make my dreams come true man… #FOTP4Life

A post shared by Lil Rel Howery (@comedianlilrel) on

Comedy Central remembered his contribution to “Broad City,” tweeting “He’ll be greatly missed.”

In his last Instagram post two days ago, Barnett was looking ahead to the future: “In mexico. Bought myself a sweater… Swag heavy. Mixtape comin,” he wrote. Now, the comments are overflowing with messages ending in “RIP.”