"Funding for their separatist causes comes directly from the CIA's classified budget but is now 'no great secret', according to one former high-ranking CIA official in Washington who spoke anonymously to The Sunday Telegraph.
"His claims were backed by Fred Burton, a former US state department counter-terrorism agent, who said: 'The latest attacks inside Iran fall in line with US efforts to supply and train Iran's ethnic minorities to destabilize the Iranian regime.'
"The Baluchistan-based Brigade of God group, which last year kidnapped and killed eight Iranian soldiers, is a volatile Sunni organisation that many fear could easily turn against Washington after taking its money.
"A row has also broken out in Washington over whether to 'unleash' the military wing of the Mujahedeen-e Khalq (MEK), an Iraq-based Iranian opposition group with a long and bloody history of armed opposition to the Iranian regime.
"The group is currently listed by the US state department as terrorist organisation, but Mr Pike said: 'A faction in the Defense Department wants to unleash them. They could never overthrow the current Iranian regime but they might cause a lot of damage.'"
"It has taken responsibility for the deaths and kidnappings of more than a dozen Iranian soldiers and officials. Tribal sources tell ABC News that money for Jundullah is funneled to its youthful leader, Abd el Malik Regi, through Iranian exiles who have connections with European and Gulf states. 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. Most recently, Jundullah took credit for an attack in February that killed at least 11 members of the Iranian Revolutionary Guard riding on a bus in the Iranian city of Zahedan.