Three fans were killed when violence broke out during Colombia's celebration of victory in the South American club football championship.
Authorities said they registered more than 600 street fights after Medellin's Atletico Nacional defeated Ecuador's Independiente del Valle 1-0 in Wednesday night's Copa Libertadores final.
It was Nacional's second-ever title win in the premier South American club tournament and the first by a Colombian team since 2004.
One of those killed was wearing the shirt of a rival Medellin club when he was slashed in the neck with a knife. There were also reports that mobs of Nacional fans attacked adversaries in Bogota.
Police say at least 23 people were injured.