Macao, June 27 (IANS) Twenty tourists from the Chinese mainland fell ill after eating at a restaurant here, the Macao Health Bureau said Sunday.

While 13 tourists showed symptoms of abdominal pain, diarrhoea, nausea and vomiting after having food Saturday night, seven people showed similar symptoms Sunday morning after dining in the same restaurant, Xinhua reported.

The restaurant has been ordered to suspend its operations and allow thorough cleansing and sterilization under the supervision of health inspectors from the bureau.