Do you know this boy?
The boy, who was clad in a short-sleeved blue shirt and khaki pants, was found along Marina Promenade at 8pm on Monday.
When officers questioned him, he could not provide his next-of-kin's details or contact numbers, said the police in a statement on their Facebook page.
The statement said he is about 1.3m tall and between eight and 10 years old.
It is not known if he is Singaporean.
Anyone with information about the boy's next-of-kin may call the police hotline at 1800-255-0000. All information will be kept strictly confidential.
Information can also be submitted online at www.police.gov.sg/CrimeStopper.