<span style="color: #222222;">At least 33 Turkish soldiers were killed in an air strike  by Syrian government forces as violence escalates in Syria's Idlib province.  </span><br />'' <br />'' <span style="color: #222222;">The deaths are the largest number of fatalities suffered by Turkey in a single day since it began sending thousands of troops into Idlib in recent weeks. </span><br />'' <br />'' <span style="color: #222222;">UN has repeatedly warned that the fighting in Idlib could potentially create the most serious humanitarian crisis since the civil war's start in 2011.</span>