The head of the Leader's office told journalists on Monday the so-called Islamic State will certainly face defeat, IRNA reported. "Daesh (the Arabic acronym for the Islamic State of Iraq and the Levant) is heading toward defeat, deterioration and destruction, and evil will never prevail," Hojatoleslam Mohammad Mohammadi Golpayegani said. In addition, he said the terrorists are linked to the US and Israel, stressing, "These Takfiri groups are in the pocket of the US and Israel."