The Secret War against Iran

The leader, Regi, claims to have personally executed some of the Iranians.

"He used to fight with the Taliban. He's part drug smuggler, part Taliban, part Sunni activist," said Alexis Debat, a senior fellow on counterterrorism at the Nixon Center and an ABC News consultant who recently met with Pakistani officials and tribal members.

"Regi is essentially commanding a force of several hundred guerrilla fighters that stage attacks across the border into Iran on Iranian military officers, Iranian intelligence officers, kidnapping them, executing them on camera," Debat said.