LONDON — Iraqi Prime Minister Haider al-Abadi said on Thursday he feared lower revenues from falling global oil prices could hurt his country’s military campaign against “Islamic State.” Speaking after attending a meeting of members of the U.S.-led coalition against “Islamic State” in London, Abadi said allies could help by potentially allowing Baghdad to defer payment for ammunition and weapons.

“Oil prices have dropped to about 40 percent of their level last year. Iraq’s economy and budget relies 85 percent on oil and this has been disastrous for us,” he told a news conference. “We don’t want to see a reverse of our military victory due to our fiscal and budget problems.”

His comments came as U.S. Defense Secretary Chuck Hagel blasted some of Abadi’s recent criticism of the pace of past U.S. and coalition efforts to support Iraq.

“I do disagree with the prime minister’s comments. I don’t think they’re helpful,” Hagel told a news briefing.

“We have a coalition of over 60 countries that have come together to help Iraq. And I think the prime minister might want to be a little more mindful of that.”

While Abadi has criticized the help given Iraq in recent comments to the media, his tone on Thursday was more one of pleading, as he asked repeatedly for more weapons and support.