GCMMF, which sells milk under the Amul brand, has hiked the prices of Amul Gold and buffalo milk by Rs 2 per litre each across all markets except Gujarat. "Prices have been increased by Rs 2 per litre for Amul Gold and buffalo milk due to increase in fat prices," Gujarat Cooperative Milk Marketing Federation (GCMMF) managing director R S Sodhi. Prices have been raised for all markets except Gujarat, he added.