It happened on Monday 30th October sometime between 5pm and 8pm in Albert Park, Middlesbrough.
A second 17-year-old male has been arrested in connection with an investigation to a rape in Albert Park in Middlesbrough.
The incident happened on Monday 30th October sometime between 5pm and 8pm.
Both 17-year-old males have been released under investigation.
Police have additional patrols in the area around the park whilst investigations continue.
Anyone who may have information regarding the incident is asked to contact Temporary Sergeant Martyn Weston on the non-emergency number 101, Crimestoppers anonymously on 0800 555 111 or www.crimestoppers-uk.org.