The latest deaths take to 11 the total number of local firemen to have lost their lives since the blaze broke out on Kornat island a week ago, said HINA, quoting the health ministry.

Six of the firefighters were found dead on Thursday last week after getting trapped within the flames of the wildfire following a sudden change in wind direction.

Another two firemen remain in hospital in a critical condition.

The fire -- which is the worst in Croatia's history -- devastated two thirds of Kornat island, which is a national park located on the country's central Adriatic coast.

It was started by a cigarette butt thrown into grass by a national park receptionist who has since been detained, according to a preliminary police investigation.