A Nigerian appeals court has quashed a lower court judgement that nullified the election of a state governor from the ruling party, saying there was inadequate evidence to prove opposition allegations of vote rigging. Announcing the unanimous decision of a panel of five appeal court judges sitting in the central city of Jos, Justice Pius Aderemi said on Monday they were overruling an electoral tribunal judgement which had voided the election of Boni Haruna as governor of Adamawa State in eastern Nigeria.