Barnala, April 28 -- A gas leak incident in a factory left a worker dead in Fatehgarh Channa village of Sangrur district on Sunday morning. Three others were hospitalised, officials said. The mishap took place in IOL Chemicals and Pharmaceuticals Limited at around 5.30 am, Barnala DSP Satvir Singh said. A preliminary investigation suggested that the leaked gas appeared to be hydrogen sulfide, and that the leakage was caused by an excessive use of hydrochloric acid during a procedural operation, he said....