Coimbatore,Feb13 (PTI) A mother and her one-year old son died in a fire caused due to LPG cylinder leak in their house at Podanur on the outskirts, police said. As the woman lit the stove, without realising the gas leak, the fire suddenly engulfed the kitchen, burning both the woman and her son, this morning, police said. Neighbours rushed them to the government hospital here, where both were declared brought dead,sources said.