The kingdom of Saudi Arabia on Saturday mass executed 81 people.

The execution of 81 people in a single day is believed to be the most significant mass execution in the country's history, surpassing a mass performance in 1980 when 63 people were convicted and beheaded for seizing the Grand Mosque in Mecca 1979, Deutsche Welle reported.

The executions on Saturday were carried out based on capital punishment sentences for convictions of terrorism and capital crimes, Saudi’s Ministry of Interior announced in the country’s state-run Saudi Press Agency.

Among the crimes committed that the ministry announced were the murder of “innocent men, women, and children” and aligning with terrorist groups such as ISIS, Al Qaeda, and Houthis, targeting Saudi residents.

The ministry also announced that the individual crimes included targeting government personnel, killing and maiming law enforcement officers, planting bombs that targeted their vehicles, and smuggling arms and bombs into the country. Other charges included kidnapping, torture, and rape.

The executed individuals were found guilty of “committing multiple heinous crimes that left a large number of civilian and law enforcement officers dead,” the SPA reported.

According to the SPA, each individual was seen by 13 judges over three separate stages of trial and provided with an attorney.