Rio 2016 organizers have put on sale an additional one million tickets for this year's Olympic Games in one of the last chances for fans to attend the quadrennial event.

The batch includes tickets of the men's basketball and football finals, and the opening ceremony, the official Agencia Brasil news service said on Thursday.

About 5.7 million tickets have already been made available for the Games, of which 3.5 million have been sold.

There was no information about when the current ticketing phase would end.

The first Olympics in South America will be held from August 5 to 21 and will be followed by the Paralympic Games from September 7 to 18.