The mishap took place when the mini-truck carrying kabaddi players and their supporters overturned and fell off a bridge near near Lahunipara last evening after its driver lost control, a senior police officer said.
While six players had died and 16 others were critically injured yesterday, three of the wounded died later, he said.
Thirteen injured persons were still undergoing treatment in hospitals in Rourkela and Banai, police said adding their condition was stated to be serious.
The state government would also bear medical expenses of the injured persons, an official in Chief Minister's Office said.