Amnesty International said in a report on Bulgaria on Thursday that police brutality there and deaths in custody persisted ``on a largescale`` despite big human rights improvements since the fall of communismin 1989.``There is a pattern of casual violence and illegal acts by police throughout the country,`` the London-based human rights group said in a statement released in Sofia.It added that those guilty of human rights violations were rarely punished.``The Bulgarian judicial system should make sure that any police abuses will be investigated. It has rarely done so,`` Amnesty said. Many victims of police abuse belong to Bulgaria's Roma minority, itsaid, adding that this was a trend common to other East European countries. Amnesty said the government had failed to provide information about investigations into deaths in custody despite repeated requests that it do so. Amnesty urged the government to set up an independent commission to investigate what it said was the persistence.