Earlier today, we documented Saudi Arabia’s largest mass execution in 25 years.

In what was billed as an effort to rid the world of 47 “terrorists”, the Saudis killed dozens of al-Qaeda affiliates and four Shiites who stood accused of shooting policemen in the anti-government protests which broke out during the Arab Spring.

Among the Shiites killed was prominent cleric Nimr al-Nimr. The Sheikh was an outspoken supporter of the anti-government movement and his death drew sharp condemnation from Iran, Hezbollah, and the Houthis on Saturday.

In the wake of the execution, “scores marched through Nimr's home district of Qatif shouting ‘down with the Al Saud’ and, in neighboring Bahrain, police fired tear gas at several dozen people who gathered to protest the news,” AP reported.

"Bahrain's Saudi-backed Sunni authorities crushed protests led by its majority Shia shortly after they erupted on February 14, 2011, taking their cue from Arab Spring uprisings in the Middle East and North Africa," al-Jazeera wrote back in February when hundreds took to the streets of Manama to commemorate the anniversary of the Arab Spring uprising. "Tensions are running high in the kingdom where a sectarian divide is deepening and there is a growing gap between the Sunni minority government and the Island’s Shia majority."

Below, find the searing (literally) images from Bahrain where police fired tear gas at protesters to disperse the crowds.

Are the days of the Gulf monarchies numbered?