Police charge man over sexual assault after citizen's arrest

A 32-year-old man has been charged over a sexual assault at the Falls Music Festival in Tasmania, after being apprehended in a citizen's arrest by the alleged victim and her friend.

Tasmania Police said a 19-year-old woman was assaulted in the mosh pit at around 9.30pm on 31 December 2017.

The incident is the third report of sexual assault at the festival in a single year.

In a statement, Falls Festival co-producer Paul Piticco welcomed the arrest, saying 'these incidences have been happening at mass gatherings for years... this unacceptable behaviour is being identified and people are coming forward'.

The statement is the first comment from organisers since the assaults, and media have been denied access following the incidents.

Susan Fahey, from the Womens Legal Service Tasmania, has described the response as a 'little disappointing'.