A man was shot dead during a riot on Saturday after trouble broke out among Palmeiras fans who had watched their team lose to Premier League club Chelsea in the final of the FIFA Club World Cup, Brazilian police said.
The man, who police said was an off-duty prison guard, was shot outside Palmeiras' stadium in Sao Paulo, where thousands of fans had gathered to watch the match on big screens.
"There were some outbreaks of fighting among fans, which unleashed a riot and a man was shot," a military police statement said.
Riot police used tear gas and rubber bullets to disperse the crowds. One man was arrested, the statement said.
Sao Paulo police investigator Cesar Saad told journalists added that 15 other fans were injured in clashes with police or in fights among themselves.
Images will be analysed to identify others involved in the riots, police said. Police continued to patrol the area to prevent any new disturbances.
Chelsea beat the Copa Libertadores champions 2-1 after extra time in the game in Abu Dhabi.
Palmeiras were aiming to win the annual tournament for the first time and join state rivals Corinthians, Santos and Sao Paulo, all of whom have won the trophy played between the top club sides in the world.
Information from Associated Press was included in this report.