WASHINGTON, April 9 (Reuters) - President Donald Trump said on Thursday Iran should not charge fees to tankers going through the Strait of Hormuz, which has been blockaded since the start of the Iran war, causing the worst disruption to global energy supplies in history.

"There are reports that Iran is charging fees to tankers going through the Hormuz Strait," Trump wrote on Truth Social.

"They better not be and, if they are, they better stop now."

Media ​reports have suggested Iran might want to charge a toll for ships passing through. Western leaders have pushed back on the idea of paying any such fees.

Iran will demand toll payments ​in cryptocurrency to retain control over Hormuz ⁠during a two-week ceasefire with the U.S., the Financial Times quoted Hamid Hosseini, a spokesperson for Iran's Oil, Gas and Petrochemical Products Exporters' Union, as saying on Wednesday.

In a separate post, without elaborating, Trump said "you'll see Oil start flowing, with or without the help of Iran."

The U.S. and Israel attacked Iran on February 28. Iran responded with its own strikes on Israel and Gulf states with U.S. bases. The war has raised oil prices and shaken global markets.

U.S.-Israeli strikes on Iran and Israeli attacks on Lebanon have killed thousands and displaced millions.

Trump announced a ceasefire with Iran on Tuesday, after having previously threatened to destroy Iran's entire civilization.

Ship traffic through the strait stood at well below 10% of normal volumes on Thursday despite the fragile ceasefire as Tehran asserted its control by warning ships to keep to its territorial waters while doing so.

The war brought traffic through the strait, a chokepoint for about 20% of global oil and liquefied natural gas shipments, close to a standstill.