Iran said on Tuesday it had identified a "major terrorist group" it said was affiliated to its arch-foe Israel and had arrested some of its members, the official IRNA news agency reported, citing an Intelligence Ministry report.
The European Union banned imports of oil from Iran on Monday and imposed a number of other economic sanctions, joining the United States in a new round of measures aimed at deflecting Tehran's nuclear development program.
French President Nicolas Sarkozy said on Friday that time was running out to avoid a military intervention in Iran and he appealed to China and Russia to support new sanctions to force Tehran to negotiate over its uranium enrichment program.
An Israeli attack on Iran is "very far off," Israeli Defense Minister Ehud Barak said.
The United States relayed a message to Iran that blocking the Strait of Hormuz would be a "red line," the New York Times reported.