BRASILIA, Brazil (AP) — The cost of building Brasilia’s World Cup stadium has nearly tripled to $900 million in public funds, largely due to allegedly fraudulent billing, government auditors say. The spike in costs has made it the world’s second-most expensive soccer arena, even though the city has no major professional team.

Mane Garrincha stadium, which boasts 288 imposing concrete pillars holding aloft a high-tech self-cleaning roof, has become the costliest project related to Brazil’s $11.5 billion World Cup. Critics call it the poster child for out-of-control spending and mismanagement, or worse.