Millwall have launched an investigation after unsavoury scenes marred the Lions' 2-1 defeat at home against Crystal Palace in the third round of the FA Cup on Saturday afternoon.
Players who took the knee before kick-off were loudly booed, while Palace winger Michael Olise was struck by a bottle thrown by the crowd in the second half.
His teammate Conor Gallagher, meanwhile, was reportedly targeted by homophobic chants.
'Millwall Football Club has a zero-tolerance policy against all forms of discrimination and will investigate any incident of alleged abuse accordingly,' a spokesperson for the Championship club told Sky Sports after the game,
'As is club policy, any individual found guilty of discriminatory abuse is issued with an immediate lifetime ban.