<span style="color: #222222;">Ankara today said that a Turkish soldier was killed and three others have been injured when the Syrian government fired on their observation post in the last rebel-held province of Idlib. <br />''<br />''Turkish defence ministry in a statement said the mortar and cannon shells launched yesterday were a deliberate attack.<br />''<br />''Turkey has 12 observation posts in Idlib, in northwestern Syria, where they are trying to maintain a tenuous ceasefire.</span><br />''<br />