© AP Photo/ Khalid Mohammed

"This is an Iraqi affair and the government did not ask the U.S. Department of Defense to be involved in direct operations," Saad Hadithi told NBC News, adding that Baghdad had "enough soldiers on the ground."

Baghdad has not asked and does not need the United States to conduct ground operations against Islamic State in Iraq, Prime Minister Haider Abadi's spokesman said Wednesday. On Tuesday, US Defense Secretary Ashton Carter said that the Pentagon had not ruled out conducting ground attacks against ISIL.. The spokesman, however, admitted that US assistance was important to Iraq to arm and train its forces.Some 3,300 US troops are currently deployed in Iraq to train local forces and protect US facilities, according to NBC News. US forces and Kurdish militia last week carried out an anti-ISIL operation in northern Iraq. The United States did not inform the Iraqi government of its actions in advance.