WASHINGTON - The White House is planning to send several hundred US military personnel to Iraq to accelerate training of Iraq’s forces following a major setback against Islamic State militants, according to media reports, citing an unnamed US official.

The proposal, which is expected to be announced later on Wednesday, stops short of a riskier option of placing advisers in the field with Iraqi combat units to help call in more precise airstrikes on the militants by a US-led coalition, according to the official.

The Pentagon has said the coalition does not need to deploy the teams in such roles, which would make them more vulnerable to attack. Instead, President Barack Obama, wary of being drawn back into a war in Iraq, has focused on better training of Iraqi forces as the best way to repel the Islamic State’s gains.

The addition of hundreds of US personnel would be a significant increase in the US contingent of about 3,000 troops in Iraq, including about 650 trainers. The trainers remain on fortified bases and do not go out on missions with Iraqi combat forces.No final decision has been made on the proposal to boost trainers, but that could come as early as this week.

The proposal surfaced a day after Obama said he was considering new options to increase training for Iraqi forces in the wake of their rout in Ramadi last month by Islamic State fighters, who control the key city 80 miles west of the capital of Baghdad.

“Where we’ve trained Iraqi forces directly and equipped them and we have a train-and-assist posture, they operate effectively,” Obama said Monday. “Where we haven’t, morale, lack of equipment, etc., may undermine the effectiveness of Iraqi security forces.”

About 8,000 Iraqi security forces have been trained by coalition trainers. US-trained Iraqi units were not engaged in combat around Ramadi when the largely Sunni city fell, the Pentagon said.

A key focus going forward will be the recruitment and training of Sunni tribal forces, which played a critical role in helping US troops drive al-Qaeda out of Ramadi and surrounding Anbar province in 2006 and 2007.

The United States Central Command’s emphasis on retaking Mosul depended critically on efforts to retrain the Iraqi Army, which appear to have gotten off to a slow start. Some Iraqi officials also thought the schedule for taking Mosul was unrealistic, and some bridled when an official from the Central Command told reporters in February that an assault to capture the city was planned for this spring.