Manchester Police said they arrested a man on suspicion of rape and assault on Sunday after Manchester United suspended Mason Greenwood following allegations on social media.
“Greater Manchester Police were made aware earlier today (Sunday 30 January) of online social media images and videos posted by a woman reporting incidents of physical abuse,” a statement read.
“An investigation has been opened and following inquiries we can confirm that a man in his 20s has since been arrested on suspicion of rape and assault.
“He remains in custody for questioning.
“Investigations are ongoing.”
Images and allegations were reportedly visible on a woman’s Instagram on Sunday morning and were later shared widely on other forms of social media.
However, they have since been removed.
United previously announced that England striker Greenwood, 20, had been suspended from training or playing with the Premier League giants.
“Mason Greenwood will not be returning to training or playing matches until further notice,” a club statement read.
In an earlier statement, United said they were aware of the allegations and images on social media, adding: “Manchester United do not tolerate any form of violence.”
Greenwood has yet to make a public comment.
Under English law, alleged and actual victims of sexual offenses cannot be named.