Compressed Natural Gas (CNG) rates were hiked by Rs 2 per kg on Friday, mainly on account of a fall in the rupee value against the US dollar, pushing up the cost of inputs.Indraprastha Gas Ltd (IGL), the sole supplier of CNG to automobiles and piped cooking gas to households in the national capital region, said CNG will cost Rs 32 per kg in Delhi from Friday midnight, as against Rs 30/kg at present.The company said in a press statement that in neighbouring Noida, Greater Noida and Ghaziabad, CNG will cost Rs 2.30 per kg more at Rs 35.90/kg. The statement said, the hike was necessitated because IGL is being forced to buy expensive imported LNG due to a drop in supplies from Reliance Industries' eastern offshore KG-D6 gas field. Also, the rupee depreciation has made the raw material natural gas from Reliance, state-owned GAIL and imported LNG even costlier.