A Tunisian judge has opened a new investigation into 20 leading opponents of President Kais Saied.
Lawyers say those accused include the main opposition leader Rached Ghannouchi, the former prime minister Youssef Chahed and the president’s ex-chief of staff Nadia Akacha.
All are charged with conspiring against state security.
Mr Ghannouchi - who was also the former Speaker of parliament - was sentenced to a year in jail earlier this month for incitement.
Mr Saied has been accused of staging a coup - after shutting down parliament, passing a new constitution and moving to rule by decree.