Turkey - Turkey has begun deploying rocket launchers and artillery along its border with Syria after last week's shooting down of a Turkish plane.
Columns of military vehicles have been seen moving from bases in Iskenderun and Diyarbakir to the border, close to the area where the jet came down.
The F-4 Phantom jet crashed into the sea after straying into Syrian airspace. The pilots are still missing.
Turkey has responded by changing its terms of military engagement.
Announcing the decision to step up its border defences on Tuesday, Prime Minister Recep Tayyip Erdogan said that any "military element" that approached the Turkish border from Syria would be treated as a threat and a military target.
He described Syria as a "clear and present threat".
Turkish TV showed pictures of a small convoy of lorries carrying anti-aircraft guns into a military base near the border town of Yayladagi.
Other military vehicles had travelled to the border town of Reyhanli in Hatay province, reports said.