Iranian security forces claimed Friday to have seized documents proving that the militants behind deadly attacks last week in the southeast of the country had foreign links. Responsibility for the execution-style killings of 12 civilians was claimed by Jundullah, a group of hard-line Sunni militants. "We have seized a lot of military-grade weapons and documents that show the group's attachment to oppressors (foreign powers) aiming to create conflict," a local officer of Iran's elite Revolutionary Guards told state television.During the weekly Friday's prayers at Tehran University, Iran's leadership accused the United States and Israel of being behind unrest in the country's border areas. "Our enemies, namely America and Zionists, who are unfortunately teachers of the Americans, have targeted three things in our country: security, the economy and science," senior cleric Ayatollah Mohammad Imami Kashani said. "The whole thing is planned in the disgraceful organization, the CIA, and based on the difference between Shiites and Sunnis," he charged in a sermon. "These idiots have not understood the culture of Shiites and Sunnis," the cleric said. "These two might have differences inside, but they are united in preserving the Koran and Islam."