Demonstrations erupted across the Middle East as Shiite Muslims protested at Saudi Arabia’s execution of prominent cleric Sheikh Nimr al-Nimr.
His execution adds a bitter new chapter to the Sunni-Shiite struggle that continues to play out across the Middle East with Iran and Saudi Arabia as the primary antagonists.
Here is a look at the implications.
He was an outspoken government critic and a key leader of Shiite protests in eastern Saudi Arabia in 2011. He was also a critic of the government of Bahrain, where a Sunni-led monarchy suppressed protests by Shiites who make up the majority of the tiny island nation. Saudi Arabia sent troops to help Bahrain crush the uprising, concerned it would spread and destabilise other Arab Gulf countries.
Sheikh al-Nimr, however, also spoke out against the Iranian-backed government in Syria for killing protesters there.
He criticised the al-Saud ruling family directly for its domestic policies and forcefully spoke out against individual royal family members. He did not deny the political charges against him but maintained he never carried weapons or called for violence.
Several Shiites mosques and places of worship were targeted by Sunni extremists in 2015 in eastern Saudi Arabia, despite attempts by security forces to clamp down on Islamic State (IS) group supporters who have also targeted police.
Sheikh al-Nimr’s execution came as a surprise to even his own family, his brother Mohammed al-Nimr said. Despite harsh verdicts against government critics, activists are typically given long jail sentences even after initial appeals that uphold death sentences.
His death is expected to further exacerbate the proxy wars for regional supremacy being fought across the region by Saudi Arabia and Iran. The two rival nations currently back opposing sides in civil wars in both Syria and Yemen.
Iran’s supreme leader Ayatollah Ali Khamenei warned Riyadh of “divine revenge” and both Saudi and Iran summoned each other’s diplomatic envoys in protest.
Saudi Arabia later announced it was severing diplomatic relations with Iran after protesters stormed and set fire to the Saudi embassy in Tehran.
Iran and Saudi have been vying for leadership in the Muslim world since Iran’s 1979 revolution, which elevated hardline Shiite clerics to power. The US war in Iraq further inflamed religious and ethnic tensions by leading to a Shiite-led government in Baghdad and a crucial shift in the sectarian balance of power in the region.
After Arab Spring protests erupted in 2011, Saudi Arabia and Iran entered into a fierce proxy war in Syria, where they are supporting opposite sides of the conflict, and in Yemen, where Saudi Arabia has been bombing Iranian-allied rebels since March. They also support opposing political groups in Lebanon, Iraq and Bahrain.