Hundreds of Somalis marched in the streets of Mogadishu on Sunday to protest a truck bombing that killed more than 230 people in a busy shopping district in the country’s deadliest single bomb attack.More than 370 were people were reported injured in the attack, when a truck carrying explosives detonated Saturday in a crowded street packed with cars and pedestrians, near government ministries and hotels.Demonstrators Sunday included many women in flowing gowns, protesting an attack that the Somali government blamed on al-Shabab, the al-Qaida-linked Somali extremist group that has carried out many similar attacks in the past.