RIO DE JANEIRO, Brazil (UPI) -- A study published Sunday said one homosexual is killed every five days in Rio de Janeiro. At least 50 homosexuals were killed between January and September of this year in the Brazilian coastal city, with the real figure probably much higher due to the reluctance of families to report the full circumstances of the deaths, said the Bay Gay Group in a report in the daily O Globo newspaper. The group also said 1,200 homosexuals were killed throughout the country between 1980 and 1991, with most of their bodies showing evidence of a violent death. The Rio gay organization's vice president, Hildes Cunha, claimed about 10 percent of crimes against homosexuals were given a serious investigation by police. Cunha said the police only bothered with cases involving rich or famous homosexuals, such as businessman Aparicio Basilio da Silva, whose case was solved 10 days after he was found dead with 97 knife wounds. The group's founder, Paulo Cesar Fernandes, said in the O Globo report that Brazilian police preferred to register the crimes as robberies that resulted in deaths rather than murders. Observers agree the groups most at risk in Rio are transvestites and homosexuals from abroad. The Bay Gay Group's study came from police records, interviews with families and newspaper reports.