At least 30 people from a party of some 200 were sickened with Salmonella after a private function at a Helsinki restaurant.

YLE reports the environmental centre of the City of Helsinki has examined the incident by means of a questionnaire together with the help of samples taken by the National Institute for Health and Welfare (THL). However, no food with the offending salmonella bacteria has been detected.

Final results will be ready next month when the questionnaire data is finally known.

A salmonella outbreak was last reported in Helsinki at the end of last year when over 10 people fell ill after eating at the same luncheon diner.