An investigation is underway after a body was located in bushland in NSW.

Police said that late on Saturday, the body was located near Newnes Plateau, about 100 kilometres north-west of Sydney.

Police, with the assistance of detectives from Chifley Police District, were searching the area north of Lithgow as part of an ongoing investigation when they made the grim discovery.

A spokesperson for NSW Police said the identity of the deceased person would not be revealed until the family had been notified.

A post-mortem examination will be conducted to determine the cause of death.

The homicide squad are assisting with the investigation and a crime scene has been established.

Anyone with any information is being urged to contact Crime Stoppers on 1800 333 000.

More to come...