"It is with deep sadness that I confirm that my client Cheick Tiote sadly passed away earlier today after collapsing in training with his club Beijing Enterprises,” agent Emanuele Palladino told Sky Sports.
His previous agent Serge Trimpont also confirmed his death to the Belgian media.
The 30-year-old moved to China in February to the second division club after just a single appearance for Newcastle in the Championship.
He was an African Nations Cup winner with the Ivorians in 2015, although he missed the final through injury, and also competed at the 2014 World Cup.
Born in Yamoussoukoro, he moved to Belgium as a teenager after being scouted by Anderlecht, who debuted him in the Champions League in 2005.
He spent a season at Roda JC Kerkrade on loan and later moved to another Dutch club Twente Enschede, who sold him to Newcastle for 3.5-million pounds in 2010. Tiote spent six and a half seasons at the club.