Three Canadian cruise ship passengers were charged with drug smuggling Monday after Sydney police allegedly found 95 kilograms of cocaine in their cabin luggage.

The haul valued at nearly $30 million was the largest seizure in Australia of narcotics carried by passengers of a cruise ship or airliner, Australian Border Force commander Tim Fitzgerald said.

Andre Tamine, 63, Isabelle Lagacé, 28, and Mélina Roberge, 22, were arrested Sunday after the MS Sea Princess, operated by California-based Princess Cruises, berthed in Sydney.

The three did not enter pleas when they were charged in the Sydney Central Local Court with importing a commercial quantity of cocaine. They face potential life sentences if convicted.

They will remain in custody until their next court appearance on Oct. 26.

One of two suitcases filled with cocaine, which Australian police say they found on board the cruise ship MS Sea Princess upon its arrival in Sydney. (Australian Border Force)

'High-risk passengers'

The trio had boarded the ship at the British port city of Southampton. Police are investigating whether they boarded with the drugs or sourced them from one of several South American ports the ship visited on its way to Australia.

Fitzgerald thanked the U.S. Department of Homeland Security and the Canada Border Services Agency for helping identify the three as "high-risk passengers" among the 1,800 on board.

Fitzgerald alleged 35 kilograms of cocaine were found in suitcases in a cabin the women shared and 60 kilograms of the drug were found in the man's luggage in a separate cabin.

Australia has among the highest prices in the world for cocaine, according to the United Nations Office on Drugs and Crime.