Northern Territory Police are calling for public assistance regarding a 13-year-old youth, who has been reported as missing.

The boy was last seen in the vicinity of Royal Darwin Hospital around 10.00pm Friday evening. 

He is described as of Indigenous appearance, with a slight build, shaved head and a rats tail. 

He was wearing a green shirt, blue board shorts and a white hat. 

Anyone with information regarding his whereabouts is urged to contact police on 131 444 or call Crime Stoppers on 1800 333 000.