Incident prompts call for tighter security for nationals in Africa

New calls for heightened security for Chinese nationals operating in Africa arise after four workers were kidnapped by armed men in Sudan's troubled Darfur region over the weekend.

Unknown assailants abducted the Chinese - an engineer and three drivers - together with five Sudanese late on Saturday at a road construction site near al-Fasher in North Darfur, the state news agency SUNA said on Sunday.