Ramaphosa deployed troops in several parts of the country to quell the unrest.
Eyewitnesses and local media reported crowds had defied a government lockdown to take to the streets. Live images showed several buildings engulfed in flames and plumes of thick black smoke billowing high above the capital.
Harry added: "I sent this email a day ago. Indeed, what I warned of happened, but I have not communicated with him since that time.”
Disappointed after their team’s loss, thousands of supporters of Arema, known as "Aremania,” reacted by throwing bottles and other objects at players and soccer officials.
The tragedy on Saturday night in the city of Malang saw a total of 125 people killed and 323 others injured after officers fired tear gas in a packed stadium to quell a pitch invasion, triggering a stampede.
The SNAI had earlier announced that tactical units were continuing operations to regain control of the facility, located in the southern Ecuadoran city of Latacunga.
The protesters swarmed into Congress, the Supreme Court and presidential palace on Sunday. Many have said they want the Brazilian army to restore the far-right Bolsonaro to power and oust the newly inaugurated leftist Luiz Inácio Lula da Silva.