MK Dons manager Karl Robinson was reportedly attacked by a group of Brentford supporters following his side's defeat at Griffin Park.
Police are believed to be investigating the incident in order to find the individuals, who are thought to have targeted the 32-year-old as he walked to the team bus after the League One clash.
It is understood that Robinson has been left "shaken" after the group threw a pint glass filled with beer at the manager and threatened him with physical harm, according to The Mirror.
Reports have claimed that Brentford are working with the police to help identify the fans in question.