BERLIN (AP) — An Islamic extremist wanted by Germany for allegedly calling for terrorist attacks on Europe has been arrested in Turkey and Berlin is negotiating his extradition, an official said Friday.

Mohamed Mahmoud, 27, was picked up Tuesday in the southeastern province of Hatay near the Syrian border, a German security official with knowledge of the talks said. The official spoke on condition of anonymity because he was not authorized to discuss the matter. He said Germany has already begun preliminary proceedings to have Mahmoud extradited.