RIO DE JANEIRO — A man opened fire in a cathedral in southern Brazil after Mass on Tuesday, killing four and leaving four others injured before turning a gun on himself, authorities said. The shooting occurred right after Mass at the Metropolitan Cathedral in Campinas, a city about 60 miles (100 kilometers) north of Sao Paulo, according to Wilson Cassante, a spokesman for the archdiocese. He told The Associated Press that the officiating priest had left before the shooting began. A spokesman for Sao Paulo state firefighters told the AP that four injured had been taken to local hospitals.