Rioters attack police on historic Protestant holiday . The violence erupted after a Catholic priest was shot dead in the city of Rio de Janeiro by two men who said they were protesting against his support for Brazil's new leftist government. People throw objects and explosives . Police have not yet released details of the number of arrests made , or the number of people injured . Disruption began on eve of holiday .
Rioters attack police on historic Protestant holiday . The violence erupted after a Catholic priest was shot dead in the city of Rio de Janeiro by two men who said they were protesting against his support for Brazil's new leftist government. People throw objects and explosives . Disruption began on eve of holiday .