A former Tunisian prime minister, Ali Larayedh, has been detained by anti-terrorism police over allegations of involvement in smuggling jihadists to Syria.
A lawyer said Mr Larayedh, who is also a senior figure in the Islamist opposition Ennahda party, had been questioned for hours.
Ennahda denounced this as a flagrant violation of human rights.
Party leader Rached Ghannouchi is due to be questioned tomorrow.
