The kitchens of a North Dublin pub have also been shut pending the investigation.
The Food Safety Authority of Ireland is liaising with the HSE after a number of people were hospitalised and treated for suspected salmonella poisoning following a First Communion party.
Reporter with Independent News and Media Conor Feehan said: “It’s understood that food may have been made on a premises and then transported to the house for a First Communion party.”
He added: “But it seems that after the party a number of people took ill and in this particular case a woman in her 50s was later found dead at home by her husband on Sunday.”
In a statement the Health Service Executive said it is investigating an outbreak of food poisoning due to salmonella in North Dublin and is liaising with the Food Safety Authority of Ireland. An Outbreak Control Team has been formed and an investigation is ongoing.