ankara turkey send 80 military vehicles include tank southern border syria state-run anadolu news agency say sunday cite military source anadolu say deployment part reinforcements troop station along border vehicles send iskendurun district southeastern province hatay anadolu say late saturday anadolu also report army dispatch first aid truck military vehicles location along heavy equipment third convoy armour vehicles head hatay reyhanli district turkey cilvegozu border gate syria locate anadolu say friday turkey foreign ministry say russia iran turkey agree deploy observers around de-escalation zone northern syria idlib region mostly control militants link former al qaeda affiliate say observers would look prevent clash force syrian regime opposition watch ceasefire violations last month turkish prime minister binali yildirim say turkey take necessary measure along 150 km 90 mile border idlib turkey send military vehicles equipment syrian border anadolu