Tuna Altınel, a mathematics professor at France’s Claude Bernard Lyon 1 University., was arrested on terrorism charges in Turkey’s Balikesir.

Media reported May 11 that Altinel stopped by a police station in Balikesir, seeking to get information about a restriction on his passport. Detained at the police station, Altinel was then remanded in prison on accusation of making propaganda on behalf the outlawed Kurdistan Workers’ Party (PKK) during a panel discussion he attended in France.

Altinel is one of the signatories of the 2016 Peace Declaration.

The declaration, signed by over 2,000 academics  in and out of Turkey, called on the Turkish government to halt operations by security forces in southeastern Turkey, restore peace to the nation and return to the negotiating table to restart shelved talks with the Kurds to find a peaceful solution to the Kurdish issue.

Signatories of the peace declaration, titled “We Will Not Be a Party to This [Turkish state’s] Crime,” face accusations of disseminating terrorist propaganda.