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Leandro Lo, one of Brazil's greatest jiu jitsu champions of all time, 

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has been shot in the head at a nightclub in Sao Paulo.

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Police said Lou, 33, was at a club in a Saudi neighborhood when he was allegedly shot by an off-duty police officer.

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Low was taken to the hospital where he was declared brain dead hours later.

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He was one of the most successful jiu jitsu athletes of all time, winning the world championship eight times.

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According to a police report seen by local media, Lo - whose full name is Leandro Lo Pereira do Nascimento

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Witnesses said the police officer started threatening the table with a glass bottle. Lou stabbed him and asked him to leave.

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The police officer then allegedly pulled out a gun and shot Lou in the forehead, police said.

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According to his family's lawyer, Lou was taken to the hospital, where he was declared brain dead.

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Police said that an investigation into the attempt to murder has been started and the police are on the lookout for the accused.

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Low won the world championship eight times in three different weight classes, an all-time record.