Why are there many suicide explosions taken place?

The head of Iraq’s government says that a series of suicide bombings is designed (23) to create chaos in that country and prevent progress toward elections that are scheduled for next year. Prime Minister Nuri Al-maliki called yesterday’s terrorist attacks cowardly. (24)The five explosions killed more than 125 people and injured more than 440 others. The bombings all took place within minutes of each other Tuesday morning. They targeted several government buildings around the capital city of Baghdad, as well as a neighborhood in a business district.