The Olympic Park in Rio de Janeiro has been closed over concerns about the safety of the complex used for the 2016 games in Brazil. City authorities closed the park on Friday after a judge ruled that safety licenses were not in order. The city had appealed the judge's decision, saying it would affect about 900 athletes training at the Olympic Park. The city said it is seeking a certificate to operate from the firefighting department and that it hopes the park will reopen soon. Rio spent about $12 billion on the 2016 Olympics. There were concerns about alleged corruption linked to the construction of some facilities as well as how Brazil would use them after the games ended. Tokyo will host the summer games this year.