A pricing document reviewed by Reuters today, Thursday, revealed that the Iraqi Oil Marketing Company (SOMO) has kept the official selling price of Basra Medium crude for Asia unchanged in May at $0.15 per barrel below the Oman/Dubai average. The producing country set the official selling price of Basra Heavy crude for Asia in May at a discount of $3.40 per barrel against Oman/Dubai, an increase of 50 cents from the previous month.