Supporters of the southern Sudan People's Liberation Movement (SPLM) chant a slogan during a demonstration near their headquarters in Khartoum, April 4, 2010. Sudan's elections commission on Saturday said the first multi-party polls in 24 years would go ahead on time, dashing an opposition party's demands for a four-week delay to address complaints of irregularities in the process. REUTERS/Zohra Bensemra (SUDAN - Tags: POLITICS ELECTIONS)