The US military has exhausted nearly 80 per cent of its interceptors for a key missile defence system as senior US military commanders are warning that the Pentagon’s munitions stockpile is “dangerously low,” according to multiple sources familiar with the matter, CNN reports.

Stockpiles of key air defence systems have been particularly depleted during the war with Iran. The US military has burned through nearly four-fifths of its THAAD missile inventory compared to pre-war numbers and roughly half of its Patriot interceptors since the start of the war, according to two sources familiar with the latest inventory report.

The disclosure of the low THAAD inventory has not been previously reported.