A key opposition party in Sudan has issued an ultimatum to President Omar al-Bashir to ensure free and fair elections this month. Ex-Prime Minister Sadiq al-Mahdi's Umma party said if its terms are not met by Tuesday, it will boycott presidential, parliamentary and state polls.<br/><br/>Its eight conditions include a delay of four weeks for a new body to supervise the election commission to be set up. Some parties have already said they will boycott the 11-13 April elections completely. <br/><br/>On Wednesday, the southern Sudan People's Liberation Movement which serves in a coalition at national level with President Bashir announced it was withdrawing from the presidential election and from polls in Darfur over fraud and security fears. President Bashir, who is wanted for alleged war crimes in Darfur, has frequently rejected the idea of delaying Sudan's first multi-party national poll in 24 years.