The Northern Territory Police Force is calling for information in relation to an alleged sexual assault that took place at a fast-food restaurant this morning.

About 6:30am, police received reports of a sexual assault on a 19-year-old female in the bathroom of a fast-food restaurant on the corner of Parsons Street and Railway Terrace. The female alerted staff who then called police.

Investigations are ongoing to locate the alleged offender and determine the circumstances of the incident.

Police are calling for any witnesses within the area at the time who may have information that can assist police in their enquiries to make contact on 131 444.