Sudanese rebels clashed with government forces on Saturday for the second time this week in the strategic South-North Kordofan region, the insurgents said.
The men had been working on a water project in North Darfur when they were abducted by armed men.
Last month, Sudanese government forces killed Khalil Ibrahim, head of the Justice and Equality Movement.
Day in Pics: 29th August
August 29, 2014
Famous Ganesh Pandals in Mumbai