Police use tear gas at Greek match
Greek riot police have fired tear gas at PAOK and Rapid Vienna fans clashing in the stands shortly before the teams' Europa League match.
No arrests or injuries have been reported, and Thursday's game for the first leg of the playoff round started with just a delay of a few minutes.
Police say the violence started when Rapid Vienna fans fired flares at PAOK supporters, who responded in kind. About 700 Rapid Vienna supporters travelled to Thessaloniki for the match.