Fijian officials are reassuring tourists it it safe to travel there, with one Australian still in intensive care after suspected alcohol poisoning.

An Australian mother and daughter landed back in Sydney on Monday night after they were among seven people believed to have been poisoned by drinks served at a five-star Fijian resort.

Tanya and Georgia Sandoe were released from hospital over the weekend and returned home to recover.

Two people, including one Australian, remain in intensive care in hospital in Fiji. Both are in stable conditions.

The tourists fell ill after drinking cocktails at the Warwick Fiji resort on the south coast of Viti Levu island.

Fiji Tourism chief executive Brent Hill said the island remained a safe travel destination despite the suspected poisoning case.

“This was a very isolated incident, even in the hotel itself there were only these seven that were affected, which is quite mystifying,” he told Seven’s Sunrise program on Tuesday.

“We certainly want to reassure people that are planning to come over for Christmas, Fiji prides itself on safety and service … we feel it’s still a very safe place to come.”

Hill said about a million Australians visited the Pacific nation per year and tourism contributed significantly to the Fijian economy.

He urged tourists to take usual precautions around drinks in foreign countries, but said investigations were continuing into the weekend incident.

“We obviously saw those distressing events in Laos and, we actually put in place a lot of regulations and made sure that, everybody was on top of their game after that,” he said.

“It was obviously very distressing to see this at this stage.”

“We still don’t want to speculate as to exactly what occurred, we are not sure until those toxicology reports actually come through.”

Fiji Deputy Prime Minister and Tourism Minister Viliame Gavoka also sought to reassure tourists.

“Fiji is and will remain typically very safe for our tourists and the recent incident at a prominent resort at the Coral Coast is an extremely isolated one,” he posted on X.

The incident has renewed official calls for travellers to be wary of drink spiking or other additives when travelling overseas.

It follows the death of two Australians in Laos, where they were among several victims of a suspected mass ethanol poisoning.

Authorities do not know what led to the Fijian poisoning cases, with samples still being tested.

Gavoka told ABC TV on Monday that one of the two people still in Lautoka Hospital in a stable condition was a girl from Fiji.

The hospital is managed by a Canberra-based company, which Gavoka said provided an Australian standard of care.

He said it was the first time such a thing had happened in Fiji, adding that the victims were drinking pina colada cocktails made with local rum and the bar server had more than 15 years’ experience.

“We are really determined to find out what [happened] … because tourism is our No.1 in this country and we are approaching Christmas and New Year,” he said.

The Warwick Fiji resort, where the suspected poisoning occurred, said it was committed to ensuring the safety and wellbeing of guests.

“Please rest assured that we are taking this matter very seriously and are currently conducting a thorough investigation,” it said.

-with AAP