(AGI) Moscow, July 14 - Moscow is considering a retaliatory"surgical strike" after Ukrainian artillery shells hit theRussian region of Rostov on Sunday, killing one person andseriously injuring two, reported the newspaper Kommersant,quoting a source close to the Kremlin. Russia "knows where theyare firing from," the source said. "Our patience is notunlimited" the source added, explaining that it is not alarge-scale operation but surgical strikes on specificpositions. . .