Iran’s supreme leader warned Saudi Arabia of “divine revenge” Sunday following the execution of a prominent Shiite cleric while Riyadh accused Tehran of supporting terrorism, escalating a war of words after protesters stormed the Saudi Embassy in Tehran.

Sheikh Nimir al-Nimir was executed Saturday along with 46 others, including three other Shiite dissidents and a number of Al Qaeda militants. Al-Namir was a key leader in the Arab Spring protests in Saudi Arabia before his arrest in 2012. His execution drew condemnation from Shiites across the region as well as several countries outside Iran.

Iran’s Supreme Leader Ayatollah Ali Khamenei condemned the execution Sunday in a statement on his website, saying al-Nimr “neither invited people to take up arms nor hatched covert plots. The only thing he did was public criticism.” FULL REPORT