A Kolkata court today sentenced three convicts to death and three others to life imprisonment for the gang-rape and murder of a 21-year-old woman in West Bengal's Kamduni. The three convicts - Ansar Ali, Saiful Ali and Amin Ali - were sentenced to death for gang-rape and murder while the other three - Emanul Islam, Bhola Naskar and Aminur Islam - were handed life terms for gang-rape.