Though it was the killing of a Shia cleric in the January 2 mass execution which sparked a crisis between Saudi Arabia and its regional rival Iran, most of the 47 executed were al Qaeda militants convicted of bombings and gun attacks in the kingdom.
Mass executions: Saudi Arabia executes 47 over terror charges
In a statement dated January 10, al Qaeda's Yemeni branch and its North African wing said Riyadh had gone ahead with the executions despite a warning not to do so.
"But they (Riyadh) insisted on offering the blood of the good Mujahideen as a sacrifice for the Crusaders on their holiday, in the New Year," the two groups said in the statement posted on social media.
"Let them wait for the day when God will heal the chests of the families of the martyrs, their brothers and those who love them from the arrogant infidel," it added.
Al Qaeda's Yemen branch threatened in December to "shed the blood of the soldiers of Al Saud" if its members were executed.
Last week, Islamic State, a Sunni rival of al Qaeda, threatened to destroy Saudi Arabian prisons holding militants after the executions.
Both organisations are fighting against Saudi Arabia, which has declared them terrorist groups and locked up thousands of their supporters.
Though it was the executions of Nimr al-Nimr, a prominent Shia cleric and three other Shia Muslims, which drove up sectarian tension with Shia power Iran, analysts say they were meant mostly to send a signal to militant Sunnis.
Saudi Arabia says 47 executed on terror charges, including top Shia cleric
These analysts suggest Saudi Arabia was aiming to crush support for Sunni militants active in the kingdom without alienating more moderate Sunnis.
Islamic State has claimed responsibility for a series of bombings and shootings in Saudi Arabia since Nov. 2014 that have killed more than 50 people, most of them Shias but also more than 15 members of the security forces.
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