Celtic fans arrested in Amsterdam before Champions League defeat to Ajax
Celtic's Champions League trip to Ajax was marred by a clash between supporters and police in the centre of Amsterdam before kick-off, following which 15 fans have been arrested.
Amsterdam Police said that fans armed with bottles and sticks attacked plain-clothed police in an incident described as 'coming out of nowhere'.
Eight police officers were injured with one knocked unconscious following the fighting in Dam Square, in the city centre.
Police said the majority of those arrested were Celtic fans, although it is believed that supporters from other clubs were also involved.
'At the end of the afternoon a large group of Celtic supporters attacked police officers in plain clothes,' a spokesman said.
'Eight were injured and one was knocked unconscious.
'A few of them had broken noses and needed stitches above their eyebrows and on their lips.
'Bottles and sticks were used in the attack which came out of nowhere.
'There were 15 arrests, mostly Celtic supporters.'
Celtic lost the match 1-0 and face an uphill battle to reach the knockout stages of the competition.
Amsterdam Police said it expected the number of 15 arrests to rise during the night and that a final figures would be 'high'.
It is thought that fans from other European clubs were involved, although police said they 'had kept themselves covered'.
Celtic supporters had been urged by the club to be careful after an attack on Hoops supporters in a city-centre bar on Tuesday night.
Thousands of Celtic supporters flooded into Holland for the Group H game at the Amsterdam ArenA.