The JDU on Friday expelled from its primary membership three leaders,including a rebel candidate contesting the Bihar Assembly elections. They are JDU Gopalganj district unit General Secretary Sumer Kumar Kushwaha,who contested against the party's official candidate in Barauli constituency,and local leaders in Gopalganj and Jamui districts Shivdhyan Singh and Devendra Singh respectively. Shivdhyan and Devendra were accused of indulging in anti-party activities during campaigning,JD-U General Secretary Ravindra Singh said in a release.