Washington designated Sunni militant group Jundallah as a terrorist organization for its violent attacks in southern Iran, the State Department said Wednesday.
The execution of militant leader Abdolmalek Rigi is a sign of the failure of policies targeting Iran, Iranian national security leaders said.
Iranian authorities announced they executed the brother of Jundallah leader Abdolmalek Rigi at a prison in the south of the country.
There is evidence that U.S. agencies are supporting the activities of the Pakistani militant group Jundallah, Iranian officials said in Turkey.
Iran has evidence to suggest captured militant leader Abdolmalek Rigi had financial support from "at least" three foreign countries, the Iranian president said.
A spokesman for the Sunni militant group Jundallah challenged the Iranian narrative of the arrest of their leader, saying it was a U.S.-Israeli operation.
Sunni militant group Jundallah pledged to step up attacks on Tehran as new leadership emerges in the wake of a high-profile capture for Iran last week.
Allegations that captured Jundallah leader Abdolmalek Rigi had contacts with U.S. officials prior to his arrest are false, the U.S. Defense Department said.
Jundallah leader Abdolmalek Rigi had ties to U.S. and Israeli intelligence officials as well as NATO commanders before his arrest, Iranian ministers said.
Iranian officials report the leader of Jundallah, a terror group based in Pakistan, was captured Tuesday on a Dubai-to-Kyrgyzstan flight.