Chamarajanagar: Four youths, who had assaulted their friend with a machete on B. Rachaiah Double Road here on Monday night, have been arrested by the Police. While the injured youth has been identified as Preetham of Ambedkar Layout here, those arrested are Nandan, Abhishek, Vijayakumar and Sunil Kumar, all residents of Babu Jagjivanram Layout. Injured…