At least nine people have been killed in a major police operation in several poor neighbourhoods in the Brazilian metropolis of Rio de Janeiro, Brazilian media including the news portal G1 reported on Tuesday. Two police officers were injured and five people were detained, local media reported. According to police, those killed were criminals. Many schools with thousands of pupils had been closed due to the operation, and residents had not left their homes for fear of gunfire. According to the G1 report, the police, who were supported by the Bope special unit, wanted to arrest the bosses of th…