Iran's Supreme Leader Ayatollah AliKhamenei said in a message on Monday Iran will punish the terrorist aggressors who targeted people and their security, the state IRIB TV reported.

"The vicious and the wicked (terrorists) fed by the arrogant (implying certain western countries) must be sure that the powerful Islamic system will not slacken in defending the security of the oppressed and faithful local people (of Sistan-Baluchestan) and will punish the aggressors threatening the people's life, wealth and security," Khamenei was quoted as saying.

"The crime of the terrorists in Baluchestan unmasked the satanic nature of the enemies of security and unity (in the country) which are supported by certain arrogant states," he said.

"The enemies are better to know that ... these wild attitudes will not harm the unity of Iran's religious and ethnic diversity," added Khamenei.

Iran's Revolutionary Guards Corps (IRGC) Chief Commander Gen. Mohammad Ali Jafari said Monday that the United States, Britain and Pakistan are aiding the Jundallah terrorist rebels, the claim which has been rejected by those countries.

The deadly suicide attack by Sunni rebel group Jundallah (God' s soldiers) occurred early Sunday in Iran's Sistan-Baluchestan province near Iran's border with Pakistan while the local officials were preparing a ceremony in which the local tribal leaders were to meet the military commanders of Iran's Revolutionary Guards Corps (IRGC).

Nearly 45 people were killed, including a number of the IRGC commanders, and dozens of others wounded.