An incident involving thirteen passengers on board a Fiji Airways flight to Los Angeles in the United States who reported feeling sick is still under investigation.

Fiji Airways has confirmed to FBC News that the cause of the illness is still being investigated – however all 13 passengers were traveling as part of the same group and at least some were sick prior to traveling on the flight.

The airline says the symptoms were isolated to a single group of passengers who stayed at the same resort in Fiji.

Fiji Airways says it has no other reports of similar symptoms on any of its other services.

As per Health, Safety & Security standard operating procedures, the airline’s catering supplier in Nadi, has sent samples of on-board food from the Los Angeles sector for testing.

The resort in question has also been notified and requested to conduct its own internal investigation and tests.

Results from the food sample tests have yet to be received by the National Carrier.