The body of a 53-year-old man was found in Chua Chu Kang Lian Sing Keng temple on Teck Whye Lane on Sunday morning (Feb 14).
The police said in an update on Monday that they have classified the case as murder and investigations are ongoing.
Mr Tan Poh Huat is understood to have sustained a head injury and was discovered by a worker who unlocked the gates of the temple in the morning. He was pronounced dead by paramedics at 7.09am.
Mr Tan is believed to be unemployed and had been living in the temple for the past five years.