Slovan Bratislava played Sparta Prague for the first time since 1993 tonight. Prague won the game 3-0.
On the 41st minute, Swedish ref Martin Strombergsson had to halt the game when fans began attacking each other in the stands.
It's the first time the two team's played since 1993 when Slovakia withdrew from Czechoslovakia.
Here are the images from the crazy riot that you need to see: