ADEN -- A bomb exploded in a prison in the southern Yemeni province of Dalea on Thursday, injuring four inmates and allowing dozens of prisoners to escape, witnesses and southern media reported. Witnesses and southern media said all those who fled the police jail belonged to Yemen's southern secessionist movement, which opposes the rule of President Ali Abdullah Saleh. Recent months have seen increasingly violent clashes between separatists and security forces, and analysts say impoverished Yemen could face a sustained insurgency from southerners unless the government seriously addresses their grievances.
