Tens of thousands of people marched Saturday across the Russian city of Khabarovsk on the border with China to protest the arrest of the regional governor on murder charges, continuing a wave of protests that has lasted for two weeks in a challenge to the Kremlin. Sergei Furgal has been in a Moscow jail since his arrest on July 9, and Russian President Vladimir Putin has named an acting successor. Protesters in Khabarovsk see the charges against Furgal as unsubstantiated and demand that he stand trial at home.