Homicide Squad detectives are investigating after three people died from suspected mushroom poisoning this week.
Four people were taken to hospital on 30 July after they became ill following a meal at a private residence in Leongatha the previous day.
Two Korumburra women, aged 66 and 70, passed away in hospital on 4 August.
A third person, a 70-year-old Korumburra man, passed away in hospital last night.
A 68-year-old Korumburra man remains in hospital in a critical condition.
Investigators executed a search warrant at a residence in Leongatha yesterday.
Detectives also interviewed a 48-year-old Leongatha woman who was released pending further enquiries.
The investigation surrounding the exact circumstances of the incident remains ongoing and police are liaising with the Department of Health in relation to the matter.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or to report confidentially log onto www.crimestoppersvic.com.au.
