It has been reported that Aleksandar Kolarov made gestures at the Manchester City crowd during the team's Premier League match against Norwich City yesterday.
The Serb allegedly made the gestures in response to fans chanting their support for recently fired manager Roberto Mancini, according to The Independent.
It is the second time this season that the defender has been accused of abusing members of the crowd, having been cleared of using bad language to supporters carrying an Albanian flag.
Malaga coach Manuel Pellegrini is being tipped to replace Mancini at the Etihad Stadium.