WALES have warned their fans not to stage a pitch invasion if they reach the World Cup on Sunday.
Robert Page's side host Ukraine in the play-off final in Cardiff – the biggest match in Welsh history in 64 years – with a spot at Qatar 2022 up for grabs.
The Dragons have not played at a global finals since 1958 and Football Association of Wales chiefs have vowed to stamp out any invasions following a spate of high profile clashes between fans and players.
A FAW statement read: "Cymru fans are award winning and respected across Europe but depending on the situation at the conclusion of the Fifa World Cup Play-Off Final; all spectators are politely requested to keep off the pitch.
"Anyone entering the field of play will be subject to criminal proceedings. It is also vitally important that the condition of the playing surface is protected for the two Uefa Nations League matches being played at Cardiff City Stadium on June 8 and 11."
Crystal Palace boss Patrick Vieira was confronted by a goading Everton supporter before the former France and Arsenal midfielder knocked him to the ground.
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The Goodison Park incident came after Sheffield United captain Billy Sharp was head-butted during a pitch invasion at the end of the Championship play-off semi-final defeat at Nottingham Forest.
There were also confrontations between fans and players after the League Two play-off clashes at Port Vale and Northampton.
Wales' play-off showdown is a sell-out and FAW chiefs warned ticketless fans not to travel to Cardiff.
Dragons fans have been told to quit letting off pyrotechnics against Ukraine or risk being arrested or banned.
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The FAW received a £1,637 (2,000 swiss francs) fine from Fifa after home supporters set off pyros at their 2-1 semi-final triumph over Austria in Cardiff back in March.
And, after being found guilty under Article 16 of the Fifa disciplinary code for the offence 'Order and security at matches (lightning of fireworks)', Welsh chiefs hope to avoid a repeat from their fans, known as the 'Red Wall'.
The statement added: "There is no safe use of pyrotechnics in spectator areas at football events with their use having many health risks and dangers such as loss of sight, limb or digit removal due to their explosive power.
"Being in possession of a pyrotechnic device at a football match or attempting to bring such a device into a football stadium, is a criminal offence under the Sporting Events Act 1985.
"Any person committing such an offence faces an FA Wales ban, probable arrest and a minimum 3 year Football Banning Order."
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