A motorcyclist had his hand severed, and he also suffered spinal injuries, in an accident with a CityCab taxi on Saturday.
That evening, the taxi's front tyre punctured and the vehicle mounted a central road divider before hitting the motorcyclist and his pillion rider who were travelling in the other direction.
The police and the Singapore Civil Defence Force (SCDF) were alerted to the accident on Republic Boulevard at 7.40pm.
Three people were taken to the Singapore General Hospital, SCDF said.
Two were serious cases: the 41-year-old male motorcyclist and his pillion rider, a 31-year-old man. Both are believed to be Malaysians.
The motorcyclist's hand was severed, and he is believed to have suffered spinal injuries, while the other man suffered major trauma injuries to his neck.
The taxi driver, 59, was taken to hospital for abrasions. Police investigations are ongoing.
The Straits Times understands that the accident occurred after the taxi's front right tyre punctured and the driver lost control of his vehicle.
Photos of the accident were shared on Facebook over the weekend. They showed the motorcyclist lying on the road with his right arm in a pool of blood.
One photo showed a CityCab taxi dented on its right side, with a flat tyre.
In one of the Facebook groups, user De Thiagan shared a photo of the motorcyclist in hospital and said doctors were able to re-attach his severed hand.
CityCab is owned by ComfortDelGro, Singapore's largest taxi operator. ComfortDelGro group corporate communications officer Tammy Tan said yesterday the company's loss adjusters and customer service team are in touch with the motorcyclist's employer.
The CityCab driver was given outpatient treatment and his passenger was not injured.