Saudi Arabia said on Saturday it executed 81 men, including seven Yemenis and one Syrian national, after they were convicted on charges including terrorism and holding "deviant beliefs", state news agency SPA reported.
The men included 37 Saudi nationals who were found guilty of attempting to assassinate security officers and targeting police stations and convoys, the SPA said, citing a statement from the interior ministry.
The number exceeded the total count of executions in the kingdom in the whole of last year.
Those punished included convicts linked to the Islamic State group, or to Al-Qaeda, Yemen's Houthi rebel forces or "other terrorist organisations", according to the SPA.
They had been plotting attacks on vital economic sites, or had smuggled weapons into the country.
The convicts had been tried in Saudi courts, with trials overseen by 13 judges over three separate stages for each individual.
The wealthy Gulf country has one of the world's highest execution rates.
Saturday's announcement marks the kingdom's highest number of recorded executions in one day, and more than the total of 69 executions in all of 2021.