This would seem to be a step beyond providing EFPs.

Iraqi militia fighters are being trained in Iran to build and use deadly armor-piercing roadside bombs and complex attack strategies against American forces, the U.S. military said Wednesday.

U.S. military spokesman Maj. Gen. William Caldwell would not say how many militiamen had gone to Iran but said that questioning of fighters captured as recently as this month confirmed many had been in Iranian training camps.

“They do receive training on how to assemble and employ EFPs,” Caldwell said, adding that fighters also were taught how to carry out attacks that use explosives followed by assaults with rocket-propelled grenades and small arms.

And it doesn’t stop there.

The accusations are the latest attempt by the United States to show that Iran is meddling in the Iraq war. If true, the training poses a serious threat to both U.S. forces and Iraqi stability. Iraq, which like Iran is majority Shiite, has found itself in a difficult position since the U.S.-led invasion in 2003, trying to maintain good relations with its neighbor while not angering the Americans.

Commanders of a splinter group inside the Shiite Mahdi Army militia have told The Associated Press there are as many as 4,000 members of their organization that were trained in Iran and that they have stockpiles of deadly roadside bombs known as EFPs.

I’m sure TIME would argue that all of this is being run by some splinter faction in the Iranian government.

As for me, I don’t have much to add. It’s no secret that Iran uses Hezbollah to attack targets and countries it won’t or can’t attack with its military. It’s no secret that no one’s willing to stop Iran’s barbarism, which will lead to immitations as other rogue states learn the lesson that what they can’t counter directly–namely, our military–they can counter through terror and on the cheap, and increasingly anywhere in the world. Until Iran pays for its meddling in Iraq and until Hezbollah is destroyed, we can expect more of the same, and farther afield than Iraq or even the Middle East.