Ukraine admitted that a Russian made surface to air missile training exercise caused the destruction of a Russian Ru-154 airliner's destruction over the Black Sea ten days ago. Two missiles were fired at a drone target. One  missile destroyed the drone while the second missile, an S-200, finding no target, searched and found the Tu-154. This "retargeting" was possible, but was not supposed to happen, according to the missile's manufacturer.  In Chechnya, rebel attacks left two Russian soldiers dead and three wounded.