Police have been granted further time to question Mason Greenwood after he was arrested on suspicion of rape and assault.
Greenwood, 20, remains in custody for questioning and enquiries are ongoing, Greater Manchester Police said.
The force launched an investigation after being made aware of images and videos alleging incidents of violence were posted on social media earlier on Sunday.
A police statement said: "Detectives have been granted additional time to speak to a man in his 20s who is being held on suspicion of rape and assault of a woman.
The suspect was arrested yesterday (Sunday 30 January) afternoon and remains in custody. Enquiries are ongoing and the victim is being offered specialist support."