Nearly 140 workers renovating Maracana Stadium for the 2014 World Cup went to hospital because of food poisoning this week.
The construction companies renovating the famed stadium said on Thursday the workers suffered diarrhea and vomiting after a meal on Tuesday. They were treated for dehydration in local hospitals and were released on the same day.
The companies said in a statement that sanitary officials were at the construction site after the incident and approved hygiene conditions for workers.
Local media said the workers got sick after eating a bad salad.
Maracana will host seven World Cup matches, including the final.