Northern Territory Police are investigating a serious assault which allegedly occurred at a bus stop on the Stuart Highway, Winnellie, between the hours of 9:00pm and 10:00pm last night.

It is alleged that the victim, a 35-year-old female, was asleep when she was woken by a male assaulting her.  

Police have arrested a 43-year-old male who is currently assisting with enquiries.

Police are requesting anyone who might have witnessed the incident to call Crime Stoppers on 1800 333 000.