Police are investigating a graphic banner displayed by Crystal Palace fans that targeted the Saudi Arabian-led takeover of Newcastle United.
The banner took aim at the Premier League's ownership test, following Newcastle's recent £305m sale.
It featured illustrations of a man dressed in traditional Saudi clothing alongside what appeared to be Premier League chief executive Richard Masters.
The banner had a checklist with alleged offences by the Saudi Arabia regime.
Listed on a picture of a clipboard under the headline 'Premier League Owners Test' were 'Terrorism, beheading, civil rights abuses, murder, censorship and persecution'.
The man in Arab-style clothing was also holding a sword with blood on it.