RUMOUR CONFIRMED: A prison officer at Port Phillip Prison has been stood down after allegedly tampering with a prisoner’s milk.

Ross and John were told at least one prisoner was taken to hospital over the incident about a month ago.

3AW Mornings confirmed the news a short time later.

G4S, the prison’s contractor, denied suggestions the prisoner required hospital treatment after disinfectant was allegedly put in the milk.

A female staff member no longer works for the company.

Corrections Victoria says it will leave the matter in the hands of G4S.