Arsenal boss Arsene Wenger said the club would accept any ban handed out "if he did it". If that's the case, Wilshere is likely to miss the game against Chelsea at Emirates Stadium next Monday.
Arsenal midfield player Jack Wilshere has been charged by the FA with making an offensive and/or insulting and/or abusive gesture.
The charge follows an alleged gesture made during the fixture between Manchester City and Arsenal at the Etihad Stadium on Saturday 14 December. The incident was not seen by match officials, but was caught on video.
Wilshere has been charged retrospectively by the FA under a new pilot project for potential 'not seen' incidents in Premier League matches.
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In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.