Poisonous gas kills 12 soldiers during cave operation Story from Yahaya Goni Methane gas exposure claims 12 Turkish soldiers' lives during cave search in northern Iraq, defence ministry confirms" At least 19 personnel were exposed to the gas during the search and clear operation on Sunday, and immediately taken to hospital. By Monday, 12 had died, the ministry said. President Recep Tayyip Erdogan said he received the news with “great sorrow” and extended his condolences to the soldiers’ families and to the Turkish Armed Forces. READ ALSO: Nigeria Customs sensitises international airline operators on currency...