Photos; Tunisia On It's Toes After Bomb Explosion On President's Elite Security Guards

A bomb explosion targeting a bus carrying members of the president’s elite security guards has killed at least 12 people in the Tunisian capital on Tuesday. President Beji Caid Essebsi has declared a 30-day state of emergency and imposed a curfew in Tunis, calling the blast a “cowardly terrorist act.” So far, no one has claimed responsibility for the blast.