Radio Free Europe/Radio Liberty: Putin reshuffles regional leaders ahead of vote; Russian customs chief out

MOSCOW - Russian President Vladimir Putin has abruptly reshuffled several regional leaders and dismissed the ambassador to Ukraine in a substantial shake-up that also included the removal of the country's longtime customs chief. Putin replaced four governors and appointed new presidential envoys to three of Russia's sprawling "federal districts," drawing heavily on former top security-services personnel in what analysts saw as a continuation of a push to tighten his grip on power since he returned to the Kremlin in 2012.