A 28-year-old man was found in a pool of blood at Orchard Plaza early Sunday morning after a slashing incident.
The Singapore Civil Defence Force (SCDF) said it dispatched an ambulance at around 5.50am.
The Straits Times understands that the man who was found with slash marks to his neck is Mr Yeo Zhen Jie.
He was taken semi-conscious to Tan Tock Seng Hospital, where he is now in a stable condition in the intensive care unit.
A 23-year-old man has been arrested for voluntarily causing hurt by dangerous means, said a police spokesman.
Graphic photos of the incident, which took place on the fourth floor of Orchard Plaza outside Tha Siam Thai Kitchen and night club Starz Singapore, were first uploaded on Facebook page Best Viral Videos just past midnight yesterday. The post has since been taken down.
In one of the photos, the victim, clad in a black T-shirt and jeans, is lying on the ground with blood around his legs.
Another man wearing gloves is seen treating his neck area with a stack of tissues by his side.
According to evening daily Lianhe Wanbao, the victim was dining at the Thai eatery with a friend, after visiting a night club on the fifth storey, when the incident took place.
At the crime scene yesterday afternoon, there were no traces of the bloody crime. All had been cleaned up by then.
Tenants The Straits Times spoke to expressed little surprise. They said it is not the first time a fight has broken out in the building, which houses several nightclubs.
Ms Ang, the owner of Flowers Flowers, a florist on the fourth floor and just three units from Starz, said her shop operates only in the day. Her unit has been at Orchard Plaza for about nine years.
Things tend to get rowdy at night and on weekends, she noted.
"The glass window of my shop front has been shattered about four times," she said. And she has found blood stains on her glass shop window on several occasions.
"I don't find the blood stains scary, I'm used to it," she said.
"That's why I have installed my own CCTV camera. The fights here are usually over girls," she added.
Ms Cecilia Nana, 47, owner of One Employment Solutions and Services, said it was common for the area outside her shop, which is near the lift lobby on the fourth storey, to be littered with cigarette butts and spit in the morning.
"Since we told the mall management, they have been quite proactive in cleaning up the area in the morning before we come to work," she said.
•Additional reporting by Derek Wong