DUBAI, United Arab Emirates — A prominent Saudi journalist who was arrested in 2018 and convicted on terrorism and treason charges has been executed, the kingdom said. Activist groups maintain that the charges against him were trumped up.

Turki Al-Jasser, who was in his late 40s, was put to death on Saturday, according to the official Saudi Press Agency, after the death penalty was upheld by the nation’s top court.

Authorities raided Al-Jasser’s home in 2018, arresting him and seizing his computer and phones.

It was not clear where his trial took place or how long it lasted.

According to the New York-based Committee to Protect Journalists, Saudi authorities maintained Al-Jasser was behind an X account that levied corruption allegations against Saudi royals. Al-Jasser was also said to have posted several controversial tweets about militants and militant groups.

CPJ’s program director Carlos Martínez de la Serna condemned the execution and said the lack of accountability in the wake of the killing of Washington Post columnist Jamal Khashoggi at the Saudi Consulate in Istanbul in 2018 allows for continued persecution of journalists in the kingdom.

Al-Jasser’s “execution once again demonstrates that in Saudi Arabia, the punishment for criticizing or questioning Crown Prince Mohammed bin Salman is death,” said Jeed Basyouni of Reprieve, an international anti-death penalty advocacy group. Basyouni added that Al-Jasser was tried and convicted “in total secrecy for the ‘crime’ of journalism.