Fighting in Sudan's Darfur region kills 51-government
Arab tribes, armed by Khartoum to help quell the Darfur insurgency, are now fighting each other for control of a gold mine and other resources
More fighting erupts in Sudan's Darfur region
Violence has ebbed since 2004 but picked up again in recent months
Fighting resumes in Sudan's Darfur after January outbreak
More than 130,000 people have been displaced since fighting re-erupted in Darfur last month
Fighting breaks out in Sudan's Blue Nile border state
The rebels, known as the SPLM-North, say the Sudanese armed forces and allied militia have started a "military dry season campaign" on Feb. 14 in a heavily populated area at Muffa
ON THE AGENDA: Ten questions we'll answer this week
Take a look at the ten key questions our global team of correspondents will be trying to answer this week