Police have been alerted.
A family member, Jack Nambari, posted the missing report on Facebook and voiced the fear that the boy, David Manihave, may have been snatched by a passerby.
He was last seen wearing a white collared shirt with a square design below the breast pocket and brown shorts and shoes, possibly black.
His parents are from the New Guinea Islands region.
David went missing from the BSP ATM area at Vision city at about midday yesterday.
He and the parents had finished shopping and gone to the car park, but the mother decided to go back to get money from the ATM and David followed her, Mr Nambari said a short time ago.
While she was using the machine, David disappeared.
“He is a very active little boy, very playful,’’ Mr Nambari said.
The family lives at the In-Service College nearby at Waigani.
Mr Nambari said the father was trying to view the CC film footage with management at Vision City.
Anyone having information about the missing boy should contact Mr Nambari on 71303176 or police at Boroko on 72207384/71094128.