Prosecutors said Monday they have indicted four major domestic refiners in a 26 trillion-won ($17 billion) price-fixing case following the outbreak of the US-Iran war earlier this year. HD Hyundai Oilbank Co., SK Energy Co., GS Caltex Corp. and S-Oil Corp. face charges of violating the fair trade act by engaging in collusive activities to raise prices of petroleum-related goods after the war triggered sharp rises in global energy prices in late February, according to the Seoul Central District P