Three separate online sushi takeaways have been ordered to close after it emerged they were being operated from the upstairs bedrooms of a house in Dublin.

The Food Safety Authority of Ireland (FSAI) said Koi Sushi, Nagoya Sushi and Kyoto Sushi were all run from the bedrooms of a house in Shanvarna Road in Santry.

It said the three take-aways, which were producing sushi without any hygiene or temperature controls” posed a “grave and immediate danger to public health.”

"Grave and immediate danger"

FSAI chief executive Dr Pamela Byrne said: “Running a food business that has not been registered and is therefore, not supervised is totally unacceptable and poses a very serious risk to consumers’ health.”

“In these instances, the unregistered businesses were producing sushi without any hygiene or temperature controls.

“Sushi is a very high-risk product because it contains raw fish which must be kept chilled to reduce the growth of dangerous bacteria.

“It can also contain cooked rice, which is a ready-to-eat product that must be kept chilled. In these instances, the absence of a food safety management system, no monitoring of the cold chain and no evidence of traceability of raw ingredients posed a grave and immediate danger to consumer health.”

On arriving at the house, the inspectors found that there was “no safety management system in place for the production of sushi.”

There was no system to ensure the food was maintained at safe temperature levels and no evidence the sushi was being produced in a safe manner.

A platter with different types of sushi - maki (front), nigiri (L) and inside-out - is pictured at a restaurant in Dublin, 04-03-2013. Image: Tobias Hase/DPA/PA Images

Meanwhile two Cork businesses have also been served closure orders.

The Funky Skunk wholesalers was ordered to close after inspectors found “a live rodent plus evidence of extensive rodent droppings and activity” which posed a grave and immediate danger to public health.

The FSAI said a member of An Garda Síochána saw a live rat running across the rear wall of the ground floor, while inspectors found “extensive rat droppings” under the kitchen sink.

There was also evidence of gnaw marks on boxed lollipops.

Meanwhile, “fresh rodent activity” was also uncovered at Speedos Restaurant on Tuckey Street in cork city.

Inspectors found rat droppings in the food storage and preparations areas of the building.