US President Donald Trump said Thursday that while overall US ammunition stockpiles remain sufficient, supplies of some types are under increasing strain.

Speaking at the White House Oval Office, Trump said the United States has a “virtually unlimited supply” of some munitions, while others are “a little bit tighter,” without providing details.

His remarks came two days after reports said the US military had used nearly 80 percent of interceptors for a key missile defense system during the war with Iran, with commanders warning that ammunition stocks were “dangerously low.”

The Atlantic, citing current and former defense officials, reported that supplies of long-range weapons and advanced interceptors, including Patriot and THAAD missiles, had fallen to as low as 20 percent of desired levels.

Five months into the war, US public support for the prolonged conflict has weakened. A media poll found Americans who expect greater instability in the Middle East outnumber those expecting more stability by three to one.

A Marquette University Law School poll found inflation and cost of living were the top public concerns, followed by the economy and then the Iran conflict. Since January, 56 percent have cited inflation and living costs as a primary or secondary concern.

Labor Department data showed inflation rose to 3.3 percent in March, 4.2 percent in May and 3.5 percent in June, above the Federal Reserve’s 2 percent target.

Meanwhile, uncertainty over the Strait of Hormuz continues to threaten energy security. US crude imports from Saudi Arabia fell to zero in July, the first full month without such imports since 1985.

Trump said Thursday that no deal had been finalized to reopen the waterway, but negotiations with Iran were continuing and an agreement could be reached soon.

Saudi-based  media, citing senior sources, reported that Iran and Oman had reached an understanding on reopening the Strait for 60 days, pending approval by Iran’s Supreme National Security Council.