The leader of the biggest party in the now-dissolved Tunisian parliament has been released by the authorities after being questioned through the night by counter-terrorism police.
Rached Ghannouchi has been accused of complicity in smuggling jihadists to Syria and Iraq, charges he has denied.
According to his lawyer, he will again be questioned later on Wednesday.
His Ennadha party has denounced his interrogation and that of the former prime minister, Ali Laarayedh, as a flagrant violation of human rights.
The Tunisian president, Kais Saied, has brooked no opposition to his rule since dissolving parliament last year.