The hands and legs of the 26-year-old deceased were bound.
He was pronounced dead at scene by paramedics.
Police have arrested a 20-year-old man in connection with the case.
The deceased has been identified as Shawn Ignatius Rodrigues, an ITE graduate who was serving his national service.
The deceased is believed to have fallen in love with the murder suspect, and was at his apartment unit that night looking for him.
Rodrigues reportedly professed his love two years ago but was rejected.
He reportedly continued to hound him despite constantly being rebuffed, and even looked him up at his home on many occasions.
The suspect is believed to have gotten into a quarrel with the deceased in the moments leading up to his death.
Residents say they heard a loud “thump” and subsequently, one resident stumbled upon the body and called the police.
One 6th floor resident said she had been attacked by the deceased two nights before he was killed, and she ran away and shouted for help.
Another neighbor said the deceased seldom spoke and usually carried a blank stare when he walked around the neighbourhood.