Nestor Gorosito, the coach of Tigre, declined to take his team back on the field for the second half. He said security officials pulled guns on his players while others clubbed players and team officials.
"Rocks were hurled at the bus carrying the Argentine players to the stadium. They were not allowed to practice at the stadium and the team's private guards were reported to have threatened the Argentine players with guns," Kfouri said. "These barbaric things took place all the time in the last century between the 1920s and 1970s. It is a sad return through the tunnel of time to the deplorable past of South American football."
He added that it is "a past that caused European teams like Milan and Real Madrid to refuse to come to South America to dispute the Intercontinental Cup" — the predecessor to the Club World Cup currently being played in Japan.
The chaotic scenes in Sao Paulo, before a sellout crowd of 65,000 at Morumbi stadium, are sure to trouble FIFA — the governing body of world football — which is already frustrated by Brazil's slow preparations to host the World Cup.
Most of FIFA's angst so far has been focused on getting stadiums and new infrastructure in place. Now security also looms as a concern for the World Cup, which will be played at 12 venues across the country.
Violence on and off the pitch still blights many matches in South America, with Brazil and Argentina particularly affected. For the World Cup, FIFA relies on local officials and police to enforce safety at the stadiums.
FIFA said it could not comment on the incident since it was not involved in its operation.
"However, for the FIFA Confederations Cup and the FIFA World Cup there will be a comprehensive security concept for the stadiums in place developed by the Local Organizing Committee together with the respective authorities and reviewed by the FIFA security experts" FIFA said in a statement
It added that "more than 30,000 security officers will be trained and certified to work during the FIFA Confederations Cup and FIFA World Cup and that it has full confidence in the security arrangements developed."
With the 2016 Summer Games slated for Rio de Janeiro, Olympic officials also are sure to review the incident.
Romer Osuna, a Bolivian official with CONMEBOL, said Tigre players were afraid to return to the field after the first half of play.
"The Tigre people declined to play because they considered security was not good enough," Osuna told Fox Sports.
Referee Enrique Osses of Chile awarded the victory to Sao Paulo after waiting about 30 minutes for Tigre to retake the field.
Sao Paulo scored twice in five minutes in the first half — a left-footed drive from Lucas in the 23rd and a lobbed shot from the right wing by Osvaldo in the 28th.
Sao Paulo, one of Brazil's most famous clubs, is a three-time winner of the Copa Libertadores, South America's most prestigious club tournament. It has also won the Club World Cup once, and twice won the Intercontinental Cup.
This was the club's first Copa Sudamericana title.
Tigre was playing in its first international final and has never won the Argentine first-division title.
Associated Press writers Steve Wade, Pedro Servin and Graham Dunbar contributed to this report.
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