Footage has emerged of football fans setting off fireworks and lighting flares before a Champions League match between Borussia Dortmund and Galatasaray on Tuesday.
The video shows Galatasaray supporters setting the streets of Dortmund, Germany alight with pyrotechnics ahead of the group stage match.
The match itself had to be stopped temporarily as fans also threw fireworks onto the pitch and into the stands.
According to local reports, police detained 700 Galatasaray fans after the game and made 21 arrests.
