FIFA on Monday condemned 'all kinds of violence' after a man was shot and injured by military police during an anti-World Cup demonstration Saturday in Sao Paulo.
A civil guard car is attacked by demonstrators during the "Nao Vai Ter Copa" (You are not going to have Cup) protest along Consolacao Street, in Sao Paulo, Brazil, on January 25, 2014
"FIFA fully respects people’s right to protest in a peaceful manner and as long as the rights of everybody are respected but condemns any form of violence," a FIFA statement read after a 22-year-old man was left in a coma after being shot in the neck and groin.
Police said he was carrying an explosive device.
Having already warned Brazil it needs to speed up final preparations for the World Cup after accusing the hosts of starting work too late.
Leaving aside ongoing concerns over stadiums and other infrastructure issues such as transport, FIFA said it retained confidence in the "comprehensive security concept (put) in place by the Brazilian authorities for the Cup.
"The security concept has worked well during the FIFA Confederations Cup and is built on models used at previous FIFA World Cups," said world football's governing body.
Saturday had seen anti-World Cup groups call demonstrations in 36 cities against the multi-billion dollar cost of staging the tournament. Most were a damp squib but Sao Paulo saw acts of vandalism with a car set ablaze as well as a police vehicle and several office windows smashed.
Local media reported 128 arrests following a turnout of some 2,500.
Although most people support the tournament as it returns to the home of the five-time champions for the first time in 64 years, Brazil is braced for social unrest of the kind which marred last year's Confederations Cup dress rehearsal.