Hong Kong has barred Scoot flights from landing after two passengers tested positive for coronavirus.

Authorities said Friday the airline's flights from Singapore won't be allowed to land until April 29 pending an investigation.

According to authorities, two passengers on a Scoot passenger flight arriving from Singapore April 11 tested positive for the virus.

Authorities said one of the passengers failed to comply with requirements issued by the Prevention and Control of Disease Regulation - specifically requirements related to quarantine policies.

The Department of Health "thus invoked the regulation to prohibit landing of passenger flights from Singapore operated by Scoot in Hong Kong from April 16 to April 29," Friday's news release says.

The Singaporean low-cost airline confirmed the suspension. The airline said the two passengers submitted valid negative pre-departure COVID-19 test results and it wasn't sure why they tested positive in Hong Kong.

Scoot said a third passenger testing negative in Hong Kong had submitted documents that didn't meet Hong Kong standards. The airline said it would "reinforce our protocols and staff training," including how to properly conduct document checks before departure.

Scoot apologized to passengers affected by the suspension. The company said it would provide rebooking where possible and refunds to those requesting it. This will apply to passengers who have flights booked from April 16 onwards.

"Scoot sincerely apologizes to our customers for the inconvenience caused," the company said.

Two weeks ago Hong Kong banned the landing of all Singapore Airlines flights. The decision was made after one passenger on a Singapore Airlines flight was confirmed to be positive after arriving in the city. Three passengers on board the same flight also failed to produce acceptable supporting documents.