The accident happened around 2am Sunday morning in Shanxi Province.A double-decker sleeper coach with 39 people on board remmed into the back of tanker loaded with flammable mathanol.Trggering a fire tha engulfed both vehicles.Only three people aboard the bus escaped,two of whom were left with serious burn.They are now being treated at a hspital in Xian,and are listed in critical condition.The two drivers of the tanker,who were not hurt in the collision were taken into police custody