Former FIFA President Sepp Blatter could be a bit relieved as Swiss federal prosecutors announced plans to drop one of two cases against him for suspected criminal mismanagement.

The Swiss attorney general's office on Saturday confirmed reports they intend to close an investigation into how Blatter and football's world governing body FIFA awarded World Cup broadcast rights in the Caribbean in 2005.

The Office of the Attorney General (OAG) said it has informed all the parties of its intention to close the case and was seeking ways to end it.

"We confirm the Office of the Attorney General of Switzerland ... considers the criminal investigation into the partial facts and allegations concerning the contractual relationship with the CFU to be complete and ready for conclusion," it said in a statement.

The OAG "intends to discontinue the proceedings," it added, giving no reason for the decision.

As a result, Blatter, who is currently serving a six-year ban from football-related activities over ethics violations, will not be prosecuted for the matter which relates to selling TV rights for World Cup tournaments too cheaply.

The 84-year-old Swiss, who led FIFA until 2015, was accused of selling TV rights to the CFU for the 2010 and 2014 World Cup tournaments for 600,000 U.S. dollars, seen as far below the market value at the time.

A spokesman for Blatter said he had not heard anything officially but had no reason to doubt the media reports.

In a second criminal case, Blatter is accused of having arranged a payment of two million Swiss francs (2.06 million U.S. dollars) to then UEFA President Michel Platini in February 2011.

The investigation in this case is not affected by its intentions to end the first case, the OAG said.

Blatter and Platini, who could not immediately be reached for comment, have maintained they did nothing wrong amid what became part of the biggest corruption scandal to shake football's world ruling body, resulting in numerous prosecutions and convictions in the United States.

(With input from agencies)