US President Donald Trump on Thursday said that American troops would leave Iraq but gave no timetable for the withdrawal, as he met the country’s Prime Minister Mustafa al-Kadhemi for the first time in Washington.

The meeting comes with attacks on American targets by pro-Iranian fighters on the rise and the Iraqi government facing calls to expel the 5,000 US troops deployed in the country as part of anti-jihadist efforts.

Trump said alongside PM Kadhemi at the White House, “So at some point, we obviously will be gone,”

“We’ve brought it down to a very, very low level”, he added.

The US leader also said that military considerations as well as oil projects and development were on the agenda for his meeting with PM Kadhemi, who took office in May.

PM Kadhemi said at the White House that he was “grateful” for US support in the war against the Islamic State jihadist group, which “strengthens our partnership for the best interest for our nation.”

The US military withdrew from Iraq in late 2011, leaving a small mission attached to the US embassy.

Kadhemi faces challenges from factions of the Hashed al-Shaabi, a coalition of Iraqi Shiite paramilitary groups with close ties to Iran.

On Wednesday, Secretary of State Mike Pompeo said that “armed groups not under the full control of the prime minister have impeded our progress,” calling for them to “be replaced by local police as soon as possible.”

On being asked about the plan for cutting the 5,000 US troops now in Iraq, Pompeo said that he had no numbers and urged people “not to focus on that.”

PM Kadhemi has angered armed groups by seizing border posts where they ran lucrative smuggling networks and imposed taxes on traders.

Attacks have risen in recent weeks, with the Iraqi army reporting another rocket attack on Tuesday evening targeting Baghdad airport, where US troops are based. The projectile did not cause damage or casualties, the army said.

Earlier in May, an American soldier and a British soldier, as well as one US contractor, were killed after rockets hit an Iraqi military base north of Baghdad.

Meanwhile, the relationship between Baghdad and Tehran must be “state-to-state and not via militias,” the source quoted Kadhemi as saying, adding that groups that “draw their strength from Iran” had bombed Iraqi targets and embezzled money.

In January, the attack at the Baghdad International Airport also killed Abu Mahdi al-Muhandis, the deputy commander of Iran-backed militias known as the Popular Mobilisation Forces (PMF).

The Iranian attack came after a US drone attacked on January 3 a convoy at Baghdad International Airport that killed Qassem Soleimani, commander of the Quds Force of Iran’s Islamic Revolution Guards Corps, and Abu Mahdi al-Muhandis, deputy chief of Iraq’s paramilitary Hashd Shaabi forces.

(With inputs from agency)