Hamas said it mourns Iran’s Supreme Leader, Ayatollah Ali Khamenei, following his killing in what it described as a “vile American-Israeli attack.”

“He provided all forms of political, diplomatic and military support to our people, our cause and our resistance,” Hamas said in a statement.

The United States administration and Israel “bear full responsibility for this blatant aggression and vile crime against the sovereignty of the Islamic Republic of Iran, as well as for its grave consequences for the security and stability of the region,” the statement added.

Hamas also said that Arab and Muslim countries bear “political, legal and historical responsibility to take immediate and decisive action.”