Western Australia was on alert after two members of a Fremantle-engined ship were rushed to hospital fearing they might have Covid-19.
Two crew members of an oil and chemical ship were taken to a WA hospital by ambulance for fear they would be infected with Covid-19.
WA Health said Saturday that test results of crew members are expected on Sunday.
On Tuesday, the tanker captain Proud Sakura WA Health was notified that 12 of the 22 staff members returned uncertain results from rapid antigen tests.
Two crew members were immediately transferred to hospital after the ship landed in Fremantle on Saturday.
Staff members are in a “stable condition”, a WA Health spokesman said.
“At this stage it is expected that all other crew members will remain in isolation or quarantine on the vessel, pending test results,” they said.
The ship left Singapore last Sunday and has previously sailed to South Korea, China and Taiwan.