The president told the Financial Times that American forces could "very easily" seize the key export hub

President Donald Trump is not ruling out the possibility of US forces seizing Iran's key export hub on Kharg Island in order to take control of the Islamic Republic's oil exports, he said in an interview with the Financial Times on Sunday.

Trump claimed his "preference" would be for Washington to control Tehran's oil industry and exports indefinitely, as it did in Venezuela following a military raid in January.

"To be honest with you, my favourite thing is to take the oil in Iran, but some stupid people back in the US say: 'Why are you doing that?' But they're stupid people," Trump said.

"Maybe we take Kharg Island, maybe we don't. We have a lot of options," Trump added, noting that such a move would also mean US forces would have to "be there for a while."

The US Department of War has been amassing forces in the region, fueling speculation about a potential ground operation. Officials in Tehran claimed the country's forces were "waiting" for American troops and dared them to "come closer," accusing the US of secretly planning an invasion while talking about negotiations.

Iran also reportedly reinforced Kharg Island's defenses with mines, man-portable air-defense systems and FPV drone units, yet Trump dismissed the possibility that Tehran could put up a fierce fight.

"I don't think they have any defence. We could take it very easily," he said of Kharg.

Following the US military raid on Venezuela that kidnapped President Nicolas Maduro and installed a friendlier government in Caracas, Trump vowed to control the country's oil industry "indefinitely."

Washington has imposed control over Venezuelan crude exports, with proceeds deposited into restricted US Treasury-run accounts rather than going directly to the Venezuelan state. The country's interim president, Delcy Rodriguez, has also agreed to sell some $100 million worth of physical gold to the US, with the proceeds similarly controlled by Washington.