Manchester derby tunnel fight: Man Utd and Man City investigated by FA after bust up
Jose Mourinho and Ederson (left) were at the centre of the Manchester derby bust up
The Football Association have launched an investigation into the incident by writing to both clubs for their observations on the fracas that followed City's 2-1 win.
Up to 20 players and coaching staff were alleged to have been involved in a bust-up.
It was triggered when United boss Jose Mourinho went to the City dressing room to tell jubilant City players to tone down their celebrations that he felt were disrespectful.
Mourinho is alleged to have had an angry exchange with City goalkeeper Ederson.
Water and milk were thrown at Mourinho and City coach Mikel Arteta is understood to have ended up with a cut above his eye.