Reports indicate that second bomb blasted near the site of previous explosion in SE of Iran. Moreover anti-regime insurgents fought with the security forces in south-eastern Iranian city of Zahedan right after this blast.
The anti-regime sunni group, Jundallah, announced in a statement that they are resorting to violence because their previous efforts to achieve their political goals were met with fierce and brutal actions of the Islamic regime of Iran and that's why they have been fighting the regime thru violent methods. Persian language web sites also report that today explosion was result of firing an RPG at a police station.
However this is solely my theory about the recent explosions in SE of Iran. And I think the first explosion was done by the Sunni group called Jundallah but the second shooting and bombing was done by the regime in order to scare people. The Sunni Jundallah insurgency group hasn't taken responsibility for it and I assume it could be done by Iranian regime to send a message to the people about any possible security vacuum that may follow if they are seriously threatened. The Iranian regime does every thing possible to stay in power and this can be their one of tactics. This is important because ethnic groups as well as other people have no rights under the Islamic regime of Iran. Any possible uprising of ethnic minorities in Iran, in massive numbers, can definitely help put an end to the rule of the clerics in Iran once and forever. Therefore regime is trying to discredit these people and scare people to gain popular support. Moreover they are releasing photos of so-called American munition in hands of Iranian insurgents and I believe this is a counter-attack against the American accusing the mullahs for the mess in Iraq.
I'll keep an an eye on the activities of the evil ruling clerics of Iran and will keep you posted.