Sixteen Hong Kong passengers were among 28 injured people still in hospital last night as a result of Friday's collision between two high-speed ferries off Macau.
Marine authorities said they had not yet discovered the cause of the collision, which occurred in thick fog and injured 133 passengers.
Shun Tak Holdings, which runs ferries between Hong Kong and Macau, said it would co-operate with any investigation.
All those still in hospital were in stable or satisfactory condition. Some suffered head injuries and bone fractures.
Of 12 injured Hongkongers who returned yesterday, five were admitted to Queen Mary Hospital and seven discharged. Eleven Hongkongers were among the 23 patients receiving medical care in Macau.
Macau Maritime Administration director Wong Soi-man said authorities had reached no conclusions and would inspect the ferries involved and question the captains and crews.