Russia's Ryazan oil refinery has suspended operations after an attack by Ukrainian drones late last week, two industry sources told Reuters on Monday. They said oil storage at the refinery had been set ablaze. Among damaged equipment were a railway loading rack and a hydrotreater unit used to remove impurities from refined products. "The railway loading equipment has been damaged. There have been no railways loadings, they stopped oil processing," one person said. Another source said the loadings have been suspended since Friday, also confirming that the plant has been stopped due to inability to dispatch oil products. Rosneft (ROSN.MM),...