Television star Nate Burrell has passed away at the age of 33.

Nate's sister Chelsey Walker has told TMZ that her brother had taken his own life on Saturday night.

She told the publication that her brother ended his life out in public in downtown Allegan, Michigan.

Nate, who appeared in A&E docuseries 60 Days In, posted a long message on Facebook before his death, which read: "This isn't an admission of guilt. I'm just tired, I've been through so much in my life.

"The pain of my situation now hurts more than I ever imagined. I can't keep going on."

Television star Nate Burrell has passed away at the age of 33

"I can only imagine how bad this would all turn out, all of the legal crap that would ensue after this with custody and everything else. You win!

"You have promised for weeks, you will ruin my life and I had no idea who I was messing with. You are right, I didn't know who I was messing with."

90 Days In followed Nate and eight other volunteers who entered jail for two months under assumed identities to put a spotlight on the problems behind bars.

The 90 Days In star served in the military as a Marine from 2006 to 2010

Nate's sister, Chelsey told TMZ: "Nathan loved his country, loved his family and was a very caring guy. He was just in a bad place.

"He was very proud of being on '60 Days In, and he really cherished his time on that show."

Fans have taken to social media to pay their respects to Nate.

Taking to Twitter, one fan penned: "Oh no! Not Nate!"

Another added: "RIP Nate! Gone too soon."

A third penned: "RIP Nate burrell."

Burrell served in the military as a Marine from 2006 to 2010.

He was in the infantry and served two tours in Iraq. Nick went on to receive his associate degree in criminal justice and law enforcement in 2014.

He was a Fish and Wildlife Officer in Michigan.

For emotional support, you can call the Samaritans 24-hour helpline on 116 123, email [email protected], visit a Samaritans branch in person or go to the Samaritans website.