One bus is destroyed and two others are damaged , an official said . All three buses were carrying Shiite pilgrims headed toward Mecca . Shia Islam is a minority sect in the mainly Sunni Muslim country , and its members face persecution from extremists . It was not immediately clear who carried out the attack .
One bus is destroyed and two others are damaged , an official said . All three buses were carrying Shiite pilgrims headed toward Mecca . It was not immediately clear who carried out the attack .