US forces in Afghanistan recently intercepted Iranian-made mortars and other weaponry in Afghanistan, although it is not clear they were shipped directly from Iran, the military's top general said Tuesday. Gen. Peter Pace, chairman of the Joint Chiefs of Staff, said that unlike in Iraq, where US officials say they are certain that arms are being supplied to insurgents by Iran's secretive Quds Force, the Iranian link in Afghanistan is murky. "It is not as clear in Afghanistan which Iranian entity is responsible, but we have intercepted weapons in Afghanistan headed for the Taliban that were made in Iran," Pace told a group of reporters over breakfast. He said the weapons, including mortars and C-4 plastic explosives, were intercepted in Kandahar province in southern Afghanistan within the past month. He did not describe the quantity of intercepted materials or say whether it was the first time American forces had found Iranian-made arms in that country.