A volley of rockets hit an Iraqi airbase north of the capital Baghdad on Sunday, injuring four Iraqi air force personnel, the army said.
Representatives of Iraqi Shia groups have made a decision to unite to expel USA forces from Iraq, a spokesman for one of them said Monday.
The US troops are ensuring that the Islamic State extremist group does not re-emerge and "providing an opportunity for the Iraqis to gain the sovereignty and independence that most Iraqis want", Pompeo said.More news: Serena Williams makes grand gesture after winning title in Auckland
On Sunday, Esper and national security adviser, Robert O'Brien, said on nationally televised TV that Iran may have struck more than just the U.S. Embassy in Iraq. "If you look at (U.S. President Donald) Trump's moves in Iran in the last 10 days, we now have a very unpredictable partner in Mr. Trump and the Americans. and we think that's a unsafe place for Canadians to be".
On January 8, Iran launched missile attacks against two such bases in Iraq in retaliation for an earlier US drone strike that killed top Iranian military commander, Major General Qasem Soleimani.
"The work's not done and we need to make sure that we rid the region of (ISIL) permanently", Conservative defence critic James Bezan said.More news: Iraqi PM tells USA to decide mechanism for troop withdrawal
Some of the shells hit the runway of the Balad air base, where some USA military personnel are based. It didn't appear any USA soldiers or citizens were injured in the attack.
Yet the report by the U.S. Defense Department's Office of the Inspector General also warned that Iraqi security forces continue to rely heavily on American and other allies when taking the fight to ISIL, raising questions about the effectiveness of military-training efforts.
The attack by at least six rockets on Sunday came just days after Iran fired ballistic missiles at two bases in Iraq that house United States forces, causing no casualties. The plane crashed killing all 176 people on board.More news: Alex Cora is a dead man walking
Trump threatened that the USA forces will not leave unless the Iraqi government paid for the air base America has built there.