The UN Security Council has approved a fourth round of sanctions against Iran over its nuclear programme.
There were 12 votes in favour of the resolution.
Turkey and Brazil voted against it. Lebanon abstained.
US President Barack Obama said the sanctions sent an “unmistakable message” to Iran. Its government had, for years, he declared failed to live up to its obligations under the Nuclear Non-Proliferation Treaty.
“Iran is the only NPT signatory in the world, the only one, that cannot convince the IAEA that its nuclear programme is intended for peaceful purposes,” he said, speaking at the White House.
“That is why the international community was compelled to impose these serious consequences. These are the most comprehensive sanctions that the Iranian government has faced.”
Iran denies Western claims it wants to build atomic weapons, insisting its uranium enrichment work is for peaceful purposes. President Mahmoud Ahmadinejad said the U.N. resolution was “valueless” and should be thrown “in the waste bin like a used handkerchief.”
The sanctions include greater surveillance of Iranian banks abroad and the expansion of a UN arms embargo against Tehran.