Footage of rampaging Ajax fans attacking Celtic supporters at pub
Eight Dutch police officers injured after clash in Dam Square ahead of kick-off.
A group of Celtic fans were attacked by masked Ajax supporters in Amsterdam.
The incident occurred in the Old Sailor Cafe in the city’s "red light district" on Tuesday night ahead of the Champions League tie between the two sides on Wednesday.
It followed on from trouble involving Dutch fans during the first game between the pair in Glasgow two weeks ago.
Amsterdam Police confirmed nine Ajax supporters had been arrested in connection with the incident.
The Dutch news website GeenStijl.nl published police CCTV footage of the incident, which was over in a matter of seconds.
Ajax fans armed with weapons are seen smashing windows at the bar, before police arrive and the supporters run away from the scene.
A force spokesman said: "A group of Ajax supporters went into a pub with Celtic supporters. After a short and quick attack, the Ajax fans left. Nine of them were arrested and are still in police custody. Today we will do anything to keep the groups separated."
Amsterdam TV station AT5 reported around 50 Celtic fans were in the pub in Oudezijds Achterburgwal, when the "very intense" incident took place.
It stated an eyewitness said the masked attackers were shouting "Amsterdam hooligans" during the incident, before they left the premises a short time later.
Broken windows were visible at the bar on Wednesday morning, which was closed for business as staff attempted to repair the damage.
A police officer told STV News that there were no other reports of football related violence in the city overnight but that authorities were on standby to deal with any potential problems.
No one was injured in the incident, while officers remained at the scene of the incident on Wednesday. Amsterdam Police escorted the Celtic fans from the area after the attack.
The Dutch media reported that eight police officers had been injured and between ten and 15 people had been arrested after a clash in Dam Square.
The incident happened in Amsterdam's main civic area before kick-off on Wednesday, reported Dutch public broadcaster NOS.
The injured police officers were taken to hospital after suffering cuts and other minor injuries.
Celtic had earlier posted a statement on its website warning travelling fans to be vigilant.
It read: "Celtic Football Club is urging all supporters in Amsterdam for tonight’s UEFA Champions League tie with Ajax to be extra vigilant following an unprovoked attack on Celtic fans last night.
"The attack in the city centre by an element of the Ajax support resulted in a number of arrests.
"Celtic are urging all supporters to be extra vigilant in the city centre and at the Amsterdam Arena, and to only stick to the advised areas for safety reasons."
UEFA will hold a hearing over Ajax fan disorder later this month relating to the first game between the two, after the Dutch supporters ripped up seats and damaged Celtic's stadium.
Police Scotland did not make any arrests at the game, which Celtic won 2-1, but said it was reviewing CCTV footage and liaising with their Dutch counterparts to identify those Ajax fans involved in the disorder.
The British Transport Police arrested two Dutch football fans on the eve of the match after alleged disorder in Glasgow Central Train Station.