At least 259 journalists have been jailed around the world this year, a press advocacy group reported on Monday, the most since it began a detailed annual census of imprisonments in 1990.

The group, the Committee to Protect Journalists, attributed the increase largely to a surge of imprisonments in Turkey after the failed military coup against President Recep Tayyip Erdogan in July.

At least 81 journalists — almost a third of the total — were incarcerated by the Turkish authorities in relation to their work, the group said in announcing the 2016 figures, “the highest number in any one country at any time.”

Among those imprisoned were Mehmet Baransu, a former columnist and correspondent for the daily newspaper Taraf, who was accused of obtaining secret documents, insulting the president and membership in a terrorist organization. He is facing a maximum sentence of 75 years.