UPDATE: Police have arrested a 16-year-old male in relation to the slashing, while a 19-year-old man has been sent to National University Hospital.
The police said that they received a call at 12.35pm regarding the incident, and "established that a case of voluntarily causing hurt with dangerous means had occurred" when they arrived at ITE College West, The Straits Times reported.
The report also said that the Singapore Civil Defence Force took the 19-year-old victim to hospital for "lacerations to his left arm and back".
A video showing a slashing incident that purportedly took place at ITE College West on Tuesday has been making its rounds online.
Various other pictures of an ambulance and a man on a stretcher, which seems to be at the same venue, have also been shared.
The video shows a man dressed in a white shirt and dark pants running after another man in dark clothes. He then tries to slash the second man with what looks like a parang (or machete).
The man who was attacked can be seen in later footage walking up a flight of stairs, as a security officer is shown walking around in the footage, giving the attacker a large berth.
The New Paper reported that the incident occurred around 11am.
Other people can be seen sitting around what looks like a large plaza, where the slashing happened, in the fringe of the video.