Al-Qaeda has claimed responsibility for a recent series of bomb attacks in Iraq that left 28 people dead in a number of Shia-populated districts across Baghdad.
The group published a statement on its website on Monday claiming responsibility for the attacks, in which many people were also injured, Reuters reported.
At least eight car bombs exploded in busy commercial streets in the capital city.
On Sunday, the Iraqi Oil Ministry said assailants bombed a section of pipeline carrying oil from the countryâ€™s largest refinery to the northern province of Nineveh.
On Sunday, Oil Ministry spokesman Asim Jihad said the bombing was carried out the previous day in an area located 390 kilometers (240 miles) north of Baghdad. There were no injuries in the attack.
On Saturday, Brigadier General Aouni Ali, the head of Iraqâ€™s main intelligence academy, and two of his bodyguards were killed in an attack in the northern city of Mosul.
On February 8, over 35 people were killed and nearly 100 others injured in a series of car bombings in mainly Shia areas of Iraq, including the southern city of Karbala.
Violence has increased in Iraq since December 2011, when an arrest warrant was issued for fugitive Vice President Tariq al-Hashemi, who has been charged with running a death squad targeting Iraqi officials and Shia Muslims.
The government has stepped up efforts to boost security across the country over the past few months.