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.

Now, an Associated Press analysis of data from Brazil’s top electoral court shows skyrocketing campaign contributions by companies that have won the most World Cup projects. The lead builder of Brasilia’s stadium increased its political donations 500-fold in the most recent election.