KUALA LUMPUR, Malaysia—Police say a Malaysian man has been stabbed to death by customers at a karaoke bar for singing too much and refusing to share the microphone. A district police official says witnesses saw a group of men punch and stab 23-year-old Abdul Sani Doli with a knife at the bar late Wednesday in eastern Sandakan town on Borneo island. The official says a brawl broke out because the men were furious that Abdul Sani was hogging the stage. He says police detained two suspects after Abdul Sani was found dead outside the bar. The official spoke on condition of anonymity Friday because he was not authorized to make public statements