Donald Trump has hit back on media reports of depleting munitions, insisting that the army has large stockpiles and expaning manufacturing.

"The U.S. has massive amounts of 'munitions,' especially of certain types," he said in a post on his social media platform Truth Social, adding that "large amounts" are being manufactured and shipped over to the country "as needed".

"Defense companies are building the largest number of plants and factories in our country’s history," Trump said.

He also threatened that "'leakers' of these treasonous statements are being hunted down," and wrote that "long term jail sentences will be sought".