The body of a teenage boy has been discovered after he went missing whilst on a three-day camping expedition. The 16 year old was found dead in a national park in Australia.

His body was discovered in the Blue Mountains, just 60km from Sydney, on Thursday, 29 January by police after a rescue helicopter joined the search operation, reports The Mirror.

He had set off on the camping trip on Tuesday, 27 January with his friend, aged 17.

The pair travelled to Leura Train Station before making their way on foot to Mt Hay, according to officers attached to Blue Mountains Police Area Command.

At approximately 5.45pm on Wednesday, 28 January the 17 year old activated his personal locator beacon after becoming separated from his friend.

A land and air search commenced and the 17 year old boy was winched from the Acacia Flats camping ground; however, his 16 year old companion could not be located.

The search continued involving local police along with Blue Mountains Rescue Squad, PolAir, NSW Ambulance paramedics, and the TOLL Rescue Helicopter.

The body of the missing boy was found in a creek in Blue Gum Forest at approximately 1pm on Thursday.

Police will prepare a report for the information of the Coroner following the teenager’s death. A post-mortem examination will be conducted in coming days to determine the cause of death, and a report will be prepared for the information of the Coroner.