Iraq is for the first time deploying troops trained by the US-led coalition in their campaign to retake the city of Ramadi from Islamic State militants, sending 3,000 of them in recent days,a Pentagon spokesman said yesterday.

Colonel Steve Warren told reporters traveling with Defence Secretary Ash Carter that 500 Sunni tribesmen, whose training by Iraqis was overseen by US troops, were also taking part in the operation. He declined to say how many Iraqi forces in total were involved in the Ramadi operation.

The Iraqi forces, backed by US-led coalition air strikes, were in the process of encircling Ramadi, the capital of Anbar province, in an effort to choke off Islamic State supplies and trap their fighters, ahead of a push to seize the city, Warren said.

Islamic State seized Anbar’s capital Ramadi two months ago, extending its control over the Euphrates valley west of Baghdad and dealing a major setback to Prime Minister Haider al-Abadi and the US-backed army he entrusted with its defence.

The government of Iraq has indicated that they have no intention of using the Shi’ite militia forces

Carter, on his first visit since taking up his post in February, met US commanders as well as Iraqi political leaders, including Abadi. He was briefed by Iraqi officials on the deployment of the coalition-trained troops.

Carter has criticised Iraqi forces in past for lacking a will to fight in Ramadi. He praised Abadi and Iraqi troops yesterday but also stressed that US-led coalition airpower needed to be complemented by “capable ground forces”.

“And getting those forces, in turn, requires inclusive governance,” Carter said during his meeting with Abadi.

The loss of Ramadi was the Iraqi army’s worst defeat since Islamic State militants swept through north Iraq last summer and raised questions about the ability of the Shi’ite-led government in Baghdad to overcome the sectarian divide that has helped fuel the Islamic State’s expansion in Anbar.

US President Barack Obama responded last month by ordering 450 more US troops to set up at Taqaddum base, which is closer to the fighting in Anbar province and only about 25 kilometres from Ramadi.

US Defence Secretary Ash Carter being greeted by US Ambassador to Iraq Stuart Jones (second from left) and Army Lt. Gen. James Terry (right) as he arrived at Baghdad International Airport in Iraq, yesterday.

One of the goals of a new US deployment to Taqaddum is to encourage Sunni tribes to join the battle against Islamic State, complementing efforts at the Ain al-Asad air base, also in Anbar.

The Iraqi forces, backed by US-led coalition air strikes, were in the process of encircling Ramadi in an effort to choke off Islamic State supplies and trap their fighters, ahead of a push to seize the city, Warren said.

Citing Iraqi battlefield reporting, Warren said Iraqi forces had advanced to the area around the University of Anbar in Ramadi, saying they were moving “methodically, deliberately and slowly”.

The US estimates there are about 1,000 to 2,000 Islamic State fighters in Ramadi, Warren said.

Shi’ite militia commanders, who have led much of the fightback in Iraq against Islamic State over the last 12 months, have said their initial focus is not on Ramadi but the nearby city of Falluja, under insurgent control for more than a year and a half.

Warren said that the government in Baghdad had indicated the militia wouldn’t be involved in Ramadi.

“The government of Iraq has indicated that they have no intention of using the Shi’ite militia forces as part of the liberation of Ramadi,” Warren said.