0:31 A group of Celtic fans were involved in altercations with local police in Valencia ahead of their Europa League game on Thursday night A group of Celtic fans were involved in altercations with local police in Valencia ahead of their Europa League game on Thursday nightSix Celtic fans in Valencia have been arrested following altercations with police officers on Wednesday night, according to Spanish police. Earlier on Thursday, Valencia confirmed in a statement that their Mestalla matchday ticket office would remain shut in the best interests of fan safety. "For safety reasons, Valencia CF have taken the decision not to open the ticket office at Mestalla today," it said. Thousands of Celtic fans are in the Spanish city for the return leg following their 2-0 defeat last week, although the 2,500 away ticket allowance is sold out. Celtic fans have been informed that there will be no fanzone for supporters without a ticket in Valencia.

Source: Sky sports February 21, 2019 10:41 UTC