The body of a man in his 40s was found floating in the waters near Collyer Quay early Tuesday morning.
The man, who is believed to be Singaporean and was described as "dark-skinned", had fallen into the water late Monday night.
A police spokesman told Yahoo! Singapore that they had received a call requesting assistance around 12:05 am on Tuesday.
The man was pronounced dead by paramedics at the scene after being retrieved from the water.
The case has been classified as unnatural death and police are investigating.