By REUTERS
ADDIS ABABA - Sudan and South Sudan broke off security talks on Thursday after failing to agree on a demilitarized zone along their disputed border to help prevent them slipping into outright warfare.The African neighbors came close to war when a border dispute in April saw the worst violence since South Sudan split from Sudan in July under a 2005 peace deal that ended decades of civil war.Both countries, which accuse each other of supporting rebels in the other's territory, returned to African Union-mediated negotiations last week, the first direct talks since the border clashes.After 10 days of talks, the two sides were unable to agree where to draw a demilitarized buffer zone along the 1,800-km- (1,200-mile-) long border.
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