Raisi says Israel's strike against IRGC in Syria will not 'go unanswered'

Iranian President Ebrahim Raisi has warned that Israel's strike that killed five Revolutionary Guard members in Syria will not "go unanswered", state media reports. 

Earlier on Saturday, an Israeli missile strike flattened a building used as a base of Iran's elite Revolutionary Guards (IRGC) in Damascus, killing five Guards and an unspecified number of Syrian troops.