Police have arrested seven people following a raid on a restaurant after 105 policeman on World Cup security duty fell ill on Tuesday.
The policemen, who included more than a dozen from the elite Rapid Action Battalion, started vomiting after eating food supplied by a local contractor.
"We have taken the matter very seriously and the incident is being investigated," Bangladesh State Minister for Youth and Sports Ahad Ali Sarkar said in a statement on Wednesday.
The incident took place on the eve of the first quarter-final between Pakistan and West Indies.
Bangladesh imposed top level security for World Cup teams after the West Indies' team bus was stoned following a group game in Dhaka this month.