At least 34 miners <a href="https://en.wikipedia.org/wiki/2015_Zasyadko_mine_disaster" id="mwAeo" rel="mw:WikiLink" title="2015 Zasyadko mine disaster">die in a suspected gas explosion</a> at the <a href="https://en.wikipedia.org/wiki/Zasyadko_coal_mine" id="mwAes" rel="mw:WikiLink" title="Zasyadko coal mine">Zasyadko coal mine</a> in the rebel-held Donetsk region of Ukraine.