Mystery Surrounds Young Comedian Kevin Barnett's Death During Mexico Holiday

There has been an outpouring of grief over the shock death of comedian Kevin Barnett, who died suddenly while on vacation.

While the cause of death is yet to be determined, the popular star had been posting photos to Instagram while holidaying in Mexico.

"In Mexico. Bought myself a sweater," he captioned a snap wearing a poncho purchased in Mexico.

"Been accused of appropriation several times. In my head I just gave a lady some money so I ain’t cold. Either way. Swag heavy. Mixtape comin."

The popular comedian -- who had previously written for The Do-Over, Hall Pass, and hit TV series Broad City -- had recently executive produced and co-created Fox series Rel, alongside Lil Rel Howery and Josh Rabinowitz.

"Our hearts are broken, as are those of everyone at 'REL,' at the news of Kevin Barnett’s passing," Twentieth Century Fox Television and Fox Entertainment said in a statement to USA TODAY.

"He was an incredibly funny, wildly talented man who had so much more to do and so many more stories to tell," the network said.

"We send our thoughts and prayers to his friends and family during this difficult time."

Barnett also co-hosted the podcast Round Table of Gentlemen for Last Podcast Network, who posted the sad news on Twitter.

Fellow comedians also paid tribute to the star, including Pete Davidson, who revealed his grief over his pal's death via a friend's Instagram Story.

"The world lost a great one today," Davidson said.

"One of our comedy family members Kevin Barnett has tragically passed. I love Kevin. I've known him for nearly 10 years and he's always been the sweetest and funniest. Always had a smile on his face. Was one of the few that treated me like a comic even when I was just 16 years old. He always made me feel part of the group."

He concluded: "Thank you Kevin for being in my life and blessing us with your talents and positive energy. This one really f--ked me up. You will be missed."

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Authorities have yet to release an official statement.