SAO PAULO (AP) — A federal court has banned the construction of a planned light-rail system in a World Cup host city in Brazil.

The federal prosecutor's office in Mato Grosso state said Wednesday on its website that investigators found "irregularities in the choice of the system and in the viability of the project."

Prosecutors say there is no way the system can be ready for the World Cup games scheduled in 2014 for the state's capital city of Cuiaba in west-central Brazil.

The state government had originally chosen a rapid transit bus system, but then decided to use light rail vehicles.

Prosecutors say that change would have led to a 57 percent rise in annual operating costs.

The Mato Grosso World Cup organizing committee was not immediately available for comment.