Which is NOT the Russian government’s action after the rescue?

Among Russia’s high command there is genuine gratitude for the British rescue effort. Without British help it’s clear that the seven Russian submariners would have perished at the bottom of the Pacific Ocean. The seven Russians have been trapped inside for three days.  Suffering from abnormally low body temperature and a lack of oxygen they’d appeared doomed. Russia’s government has ordered an investigation into why the submarine became trapped, and why Russia’s Navy couldn’t rescue its own men.