Iran's stock of uranium close to weapons grade has jumped since December, two reports by the U.N. nuclear watchdog said on Wednesday.

Iran has accelerated its production of near weapons-grade uranium as tensions between Tehran and Washington rise after the election of U.S. President Donald Trump, a report by the United Nations’ nuclear watchdog seen by The Associated Press on Wednesday showed.

According to the International Atomic Energy Agency, Iran is the only non-nuclear weapon state to enrich uranium to 60%, which is higher than what's necessary to produce nuclear power.