From The Guardian.

"Saudi Arabia executes 37 citizens over alleged terrorism offences

Published: 17:48 Tuesday, 23 April 2019

Saudi Arabia has executed 37 citizens across the country for alleged terrorism-related crimes, publicly pinning one of their headless bodies to a pole as a warning.

The mass execution on Tuesday was the biggest in a single day in Saudi Arabia since January 2016, when 47 people were killed, including a prominent Shia cleric whose death prompted protests in Iran and the ransacking of the Saudi embassy in Tehran...

...The Saudi interior ministry said the killings were carried out in accordance with Islamic law, using language that indicated they were all beheadings. The body of one of the men, Khaled bin Abdel Karim al-Tuwaijri, was attached to a pole for several hours. The display is not typical of the kingdom and was seen as controversial. The ministry did not say where this took place.

The government defends executions as a powerful deterrent...

...The mass execution was ratified by a royal decree. Such actions are traditionally carried out after midday prayers."

My comment is the thread title.