Maradona, 60, had recently battled health issues and underwent emergency surgery for a subdural haematoma several weeks ago.
He suffered a heart attack at his home in the outskirts of Buenos Aires on Wednesday, Argentinian media and acquaintances of the former player said.
Maradona won the World Cup with Argentina in 1986.
Reports from Argentina that Diego Armando Maradona has died. By some distance the best player of my generation and… https://t.co/A0iZVYrFnR
— Gary Lineker (@GaryLineker) 1606322090000
Argentine President Alberto Fernandez declared three days of national mourning after the news of Maradona’s death.
Retired Brazilian soccer star Pelé mourned the death of Maradona. “Certainly, one day we’ll kick a ball together in the sky above,” he said in a brief statement provided to Reuters by a representative.
My hero no more ..my mad genius rest in peace ..I watched football for you.. https://t.co/JhqFffD2vr
— Sourav Ganguly (@SGanguly99) 1606322837000
RIP #diegomaradona 💔💔
— Harbhajan Turbanator (@harbhajan_singh) 1606322947000