A man has been arrested on suspicion of a "racially aggravated public order" during Saturday's clash between Manchester City and Manchester United, Greater Manchester Police have confirmed.
During the second half of United's 2-1 win at the Etihad Stadium, the visitors' midfielder Fred appeared to be hit by an object thrown from the crowd as he prepared to take a corner.
Lighters and a plastic bottle could be seen by the corner flag, while television footage seemed to show a supporter making racist gestures in the direction of Brazil international Fred and his team-mate Jesse Lingard.