United States military officials have accused Iran of smuggling advanced weapons into Iraq. According to the officials, Iran has been providing Iraqi terrorists with rockets, rocket propelled grenades, armor-piercing roadside bombs, and even portable surface-to-air missiles.
The US has arrested several Iranians in recent months in connection with terrorist activity in Iraq. Soldiers recently detained an Iranian man in northern Iraq, a move criticized by Iraqi politicians, who said the man was in the country on business.