Iran's Supreme Leader Ayatollah Ali Khamenei denies responsibility for Hamas attack. Khamenei is considered the most powerful man in Iran and has the final say in all strategic matters. A few days before the attacks, Khamenei had reiterated Iran's threats to destroy Israel. Iran's exact role remains unclear, but Iranian allies are said to have provided military training, logistical assistance and tens of millions of dollars in weapons. However, according to American and Israeli officials, there is no clear evidence that Iran authorized or directly coordinated the attack.