Saudi Arabia has executed Sheikh Nimr al-Nimr along with 47 others in defiance of international calls for the release of the prominent Shia cleric and other jailed political dissidents in the kingdom.

The state-run Saudi Press Agency (SPA) and state television reported the executions Saturday, citing the kingdom’s Interior Ministry.

According to the Saudi ministry, those executed had been found guilty of involvement in “terrorism.”

Sheikh Nimr, a critic of the Riyadh regime, was shot by Saudi police and arrested in 2012 in the Qatif region of Shia-dominated Eastern Province, which was the scene of peaceful anti-regime demonstrations at the time.

He was charged with instigating unrest and undermining the kingdom’s security, making anti-government speeches and defending political prisoners. He had rejected all the charges as baseless

In 2014, a Saudi court sentenced Sheikh Nimr to death, provoking widespread global condemnations. The sentence was upheld last March by the appeal court of Saudi Arabia.

Amnesty International also criticized the process of Sheikh Nimr’s trial and said it views the charges against the cleric as his right to free speech. 

The death ruling sparked angry reactions from international rights bodies as well as many Muslim nations, including Iran, Iraq, Lebanon, Afghanistan and India, where people staged large protest rallies and called for the release of Sheikh Nimr as well as all political detainees in the kingdom.

Shocked by the news of his brother’s execution, Sheikh Nimr’s brother, Mohammad, slammed Riyadh’s decision, which he said, was a negative response to the Shia cleric’s pro-democracy demands, Arabic-language media reported him as saying.

He further called on supporters of his brother to show due reaction to Sheikh Nimr’s death.

Last October, United Nations Secretary General Ban Ki-moon also urged Saudi rulers to revoke the cleric’s death verdict.

Human rights organizations have lashed out at Saudi Arabia for failing to address the rights situation in the kingdom. They say Saudi Arabia has persistently implemented repressive policies that stifle freedom of expression, association and assembly.

The new announcement comes a day after a tally by The Associated Press, which was based on reports by Amnesty International, showed Saudi Arabia had carried out 157 executions in 2015, most of which were beheading by sword. This is a record of the most capital punishments conducted in a single year since 1995.