Colombia : Deportivo Independiente Medellín - Atlético Nacional - 02/04/2011

Source : Semana.com + Eltiempo.com

If 1400 policemen were present to this game, serious brawls erupted during and after the game and 15 people were injured, including 2 who were hospitalized after they were stabbed.
Everything started after 61 minutes of playing, when Nacional scored its 3rd one, DIM supporters, in the north side of the stadium, passed through the gates and attacked Atletico Nacional supporters in the east part of the stadium.
Police intervened with tear gas and the referee stopped the game for 6 minutes.

After the game, Medellin supporters fronted police and Nacional rivals.
Two supporters, aged 19 and 22 were arrested with 7 home made bombs.
Police also seized 439 weapons and 68 people were arrested.