Iran has dramatically increased the amount of near-weapons grade enriched uranium it possesses, according to a report by the International Atomic Energy Agency circulated Saturday to member states in preparation for the agency’s June board meeting.

Iran has increased production of highly enriched uranium, according to the United Nations nuclear watchdog, as the nation conducts talks with the United States on a nuclear deal.

The report comes at a sensitive time, as President Donald Trump seeks to reach a deal with Tehran to limit its nuclear program.