Photo by Peter McIntosh.

A Government investigation into Dunedin Pizza Huts found several hygiene issues, but no evidence of expiry date tampering.

In February, three employees at the franchise's two stores in the city resigned, alleging poor hygiene in the premises including expiry date tampering, serving food past its best-before date and broken equipment.

The Ministry for Primary Industries then began investigating the claims.

This week, ministry food compliance manager Melinda Sando said it had completed its investigation.

"Our inquiries identified some concerns with hygiene and food practices that needed action, specifically ensuring stored food is covered properly, improving cleaning practices and replacing worn or damaged equipment."

However, no evidence was found to support allegations of altering date marks, she said.

"MPI is satisfied that appropriate steps have been taken by Restaurant Brands NZ Ltd and store management to improve the hygiene and practices at both Pizza Hut North and South Dunedin so that both food businesses meet the requirements for production and sale of safe and suitable food."

The ministry took allegations seriously and encouraged food workers and the general public to report concerns to it directly to "enable an independent assessment and investigation if necessary".

The Otago Daily Times asked Pizza Hut owner Restaurant Brands yesterday for comment on the investigation, including whether management at the stores had changed since the investigation began.

The company declined to comment.