Five supporters have been arrested so far for incidents during Crystal Palace's 2-1 win at Millwall in the FA Cup third round.
One Millwall fan has been arrested for alleged discriminatory abuse, two more for assaulting stewards and another for a pitch incursion at The Den.
A Palace fan has been arrested for use of pyrotechnics.
Two people have been identified by CCTV in relation to missile throwing, one of which struck Palace's Michael Olise.
These images have been passed on to the Metropolitan Police.
Millwall are still reviewing CCTV footage and the club are expecting to identify more individuals from both home and away ends for missile throwing.