United Nations ? The U.N. Security Council approved a resolution Monday demanding that Iran suspend its enrichment and reprocessing of nuclear fuel by Aug. 31 or face the threat of economic and diplomatic sanctions.

The resolution, passed 14 to 1, represented the first time the international body has legally required Iran to halt its enrichment of uranium. It increased pressure on Tehran to begin negotiations with Britain, China, France, Germany, Russia and the United States aimed at addressing international concerns that it might be developing nuclear weapons.

Only Qatar, a Persian Gulf sheikdom that represents Arab views on the council, voted against the resolution. Qatar’s ambassador, Nassir Abdulaziz Al-Nasser, said his government didn’t object to the substance of the resolution but had not been given enough time to study it.