Tiote left Newcastle in the New Year to join Chinese side Beijing Enterprises.
And his spokesman Emanuele Palladino confirmed Tiote passed away after collapsing in training earlier today.
Newcastle, who Tiote made 156 appearances for, wrote:”We are devastated to have learnt of the tragic passing of Cheick Tioté at the age of just 30.
The thoughts of everyone at Newcastle United are with Cheick’s family, friends, teammates and everyone connected with the clubs he represented.
“The Ivory Coast midfielder, who made more than 150 appearances for the Magpies between 2010 and 2017, was training with his current club, Bejiing Enterprises, on Monday when he collapsed.
“He was taken to hospital but sadly passed away. Cheick cemented his place in Newcastle folklore with his dramatic equaliser in the 4-4 draw against Arsenal in February 2011.”
Newcastle boss Rafa Benitez added: “It is with great sadness that I have this afternoon learned of Cheick’s death.
“In the all the time that I have known him, he was a true professional, dedicated and above all, a great man. Our hearts go out to his family and friends at such a sad time.”