An explosion at the <a href="https://en.wikipedia.org/wiki/PetroChina" id="mwAR4" rel="mw:WikiLink" title="PetroChina">PetroChina</a> Chuandongbei natural gas field in <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Kai_County" id="mwAR8" rel="mw:WikiLink" title="Kai County">Kai County</a>, <a href="https://en.wikipedia.org/wiki/Chongqing" id="mwASA" rel="mw:WikiLink" title="Chongqing">Chongqing</a>, China, kills at least 234.