An 83-year-old passenger on board Royal Caribbean International’s Quantum of the Seas tested positive for COVID-19 on Wednesday, Singapore's Ministry of Health said in a statement.
The passenger had reported to the ship medical center with symptoms and was tested with PCR equipment on board. The 83-year-old was immediately isolated after getting the results.
Close contacts of the individual have tested negative and have been quarantined.
Singapore's National Public Health Laboratory will re-test that sample and a second sample will be taken to verify the results.
An epidemiological investigation has been initiated and contact tracing is in progress, the Ministry of Health said. All passengers will undergo mandatory COVID-19 testing before they are allowed to leave the terminal at Marina Bay Cruise Centre.
The ship will go through a "deep cleaning and disinfection," the cruise line said in a statement.
"The health and safety of our guests and crew are of utmost importance to us, and we have made the decision to cancel the 4-night cruise departing tomorrow, December 10," Royal Caribbean said.
ABC News' Christine Theodorou contributed to this report.