A former mayor of Russia's fourth-largest city was detained on Thursday on charges that could land him behind bars, part of authorities' efforts to muzzle dissent.
Yevgeny Roizman, a sharp critic of the Kremlin, is one of the most visible and charismatic opposition figures in Russia.

He enjoyed broad popularity while serving as mayor of Yekaterinburg, a city of 1.5 million people in the Ural Mountains.