Police fear they have found the body of a six-year-old girl who went missing on the south coast of New South Wales.

On Sunday evening, police found a body believed to be Airlie Montgomery, who was last seen at North Nowra, 170km south of Sydney, at about 2.15pm the same day.

When she could not be located or contacted, the South Coast Police District was called and officers immediately launched an investigation.

Her family was very concerned for Airlie’s welfare due to her young age and a number of medical conditions.

A police statement said: ‘About 6pm, a body was located during the search within a bushland in the North Nowra area.

‘While it is yet to be formally identified, it is believed to be that of the missing girl.

‘Inquiries into the incident have commenced. A report will be prepared for the information of the Coroner.’

Airlie was described as being of Caucasian appearance, of small/slim build, with blonde/brown hair in a pony tail and dark eyes.