The explosions of two car bombs that were aimed at government buildings on Sunday left 132 dead and 500 wounded in central Baghdad in the deadliest attack occurred this year in the Iraqi capital.
Two powerful explosions rocked buildings and columns of smoke rose in the capital, near the Tigris River.
The first car bomb had targeted the Ministry of Justice and the second, which exploded minutes later, was addressed to a provincial government building in Baghdad, police said.
The office of Prime Minister Nuri al-Maliki said the attack was intended to generate chaos in Iraq, like the attacks of 19 August against the ministries of Finance and Foreign Affairs as well as disrupt the parliamentary elections in January.
"These are the same black hands (the attack on 19 August) which are covered with the blood of Iraqi people," said the statement from the office of prime minister.
"They want to cause chaos in the nation, to hinder the political process and avoid the parliamentary election," he added.
The U.S. president, Barack Obama, said the attacks were unacceptable and the White House said the president had called Maliki and Iraqi President Jalal Talabani, to undertake "remained with the Iraqis."
"These bombings not serve any other purpose than to kill men, women and innocent children, and only reveal the hatred and destructive agenda of those who would deny the Iraqi people the future they deserve," Obama said in a statement.