US Secretary of State Marco Rubio has called on China to prevent Iran from closing the Strait of Hormuz, one of the world's most important shipping routes.

His comments came after Iran's state-run Press TV reported that parliament had approved a plan to close the Strait but added that the final decision lies with the Supreme National Security Council.

Any disruption to the supply of oil would have profound consequences for the economy. China in particular is the world's largest buyer of Iranian oil and has a close relationship with Tehran.

Oil prices rose following the US attack on Iranian nuclear sites, with the price of the benchmark Brent crude reaching its highest level in five months.