ISLAMABAD, Pakistan (CNN) -- Pakistan denied Wednesday that it is harboring a Sunni rebel leader accused of orchestrating a suicide attack in neighboring Iran.
Tehran has vowed "a crushing response" to the Sunni rebel group Jundallah for Sunday's suicide bombing in Sistan-Baluchestan province that killed 42 people. Iran has accused the United States and Pakistan of having links to Jundallah.
Iran has demanded Pakistan hand over Jundallah leader Abdul Malik Rigi, whom Tehran blames for plotting the attack. But Pakistani Interior Minister Rehman Malik said Wednesday that Rigi is in neighboring Afghanistan.
Iran's government-funded Press TV said Jundallah has claimed responsibility for the attack, which killed several key leaders of the elite Revolutionary Guard Corps.
