A woman was sexually assaulted in the main street of Katherine in the early house of Sunday morning by two men, with one of the alleged offenders having been arrested, NT Police said.

Police director of communications Mark Wilton said in a statement that about 2am Sunday, police received a report that a woman was sexually assaulted by two males, who were strangers, in the vicinity of Katherine Terrace, Katherine South .

He said the woman was taken to the Katherine District Hospital, and at 1am on Monday police identified a 34-year-old man who was subsequently arrested, and is expected to be charged today.

Police are asking anyone with information to cal them on 131 444 (quote reference NTP2400071078), or make an anonymous report by calling Crime Stoppers on 1800 333 000 or make a report though the website.