Measures include scrutiny of financial transactions and periodic inspections . The U.S. has lobbied other countries to boost sanctions against Iran . Iran has dismissed claims that it is using uranium to build a nuclear weapon . Korea also will expand a sanctions blacklist to limit the foreign-exchange transactions of more than 100 people and Iranian entities ; step up inspections of suspicious cargo to and from Iran ; put those blacklisted on a travel ban ; and limit investments in Iran 's gas and oil refinery industries . The country has defied UN Security Council resolutions , the IAEA says .
Measures include scrutiny of financial transactions and periodic inspections . The U.S. has lobbied other countries to boost sanctions against Iran . Iran has dismissed claims that it is using uranium to build a nuclear weapon . The country has defied UN Security Council resolutions , the IAEA says .