13/04/2017 11:48 AM AEST | Updated 05/05/2017 10:56 AM AEST

Missing Teenagers And Newborn Baby Found Safe

The pair were located hours after walking out of Nepean Hospital.

Sally Anscombe
Stock image of a newborn baby holding on to mother's hand while in hospital a few hours after being born.

Two teenagers and their newborn baby who went missing from hospital in the NSW Blue Mountains on Thursday have been found "safe and well".

Around 4:15pm on Thursday afternoon the parents, aged 14 and 15, and their three-day-old baby were located safe and well by authorities, half-a-day after the pair walked out of Nepean Hospital.

The teens went missing on Thursday after taking the baby unnoticed around 12.30am. Police believe the pair left hospital on foot.

NSW Police are now talking to the teens and ambulance officers are now assessing the baby as a medical precaution.

Earlier, police alleged there was a man with the children, however his identity remains unknown.

Police issued the alert with concerns for the welfare of all three children and asked people to report any sightings of the teenagers and baby, who are linked to the NSW Central Coast and Mount Druitt areas.

EDITOR'S NOTE: This story has been updated to withdraw identifying features of the parents and baby AM, in accordance with a suppression order issued by the Children's Court of NSW.