US President Donald Trump vowed fresh strikes on Iran Thursday, adding that US forces would soon seize the country's key oil infrastructure.

The US military will hit Iran "VERY HARD TONIGHT," Trump said in a Truth Social post.

"At some point in the not too distant future, we will be taking Kharg Island, and other oil infrastructure points, and assume total control of their Oil and Gas Markets, much like we have with Venezuela," he added.

Kharg Island is central to Iran's oil exports and any attack on its energy infrastructure could also have serious consequences for global oil markets that have already been pushed to the brink.

About 90% of Iran’s crude oil exports leave the country via the island, much of it destined for China and other Asian markets.