A female body was floating in the waters of Kallang River, near the MRT station, on Sunday (March 10).
Responding to queries by Stomp, the police said they were alerted to a case of unnatural death at the river at 5.29pm.
The Singapore Civil Defence Force told Stomp that it received a call for assistance at around 5.35pm.
The woman's body was retrieved and she was pronounced dead by paramedics at the scene.
A video uploaded by Jessika Putry on Monday (March 11) shows the authorities setting up a death tent at the scene and has been viewed almost 95,000 times.
Police investigations are ongoing.