The crackdown on Monday is the first major one since March, when protests organized by Navalny saw more than 50,000 people come to the streets across the country.
Russia holds its next presidential election next March, in which President Vladimir Putin is expected to run for a new six-year term. Navalny has announced his intention to run as a candidate in the election, even though his conviction in an embezzlement case — which he says is Kremlin’s attempt to sabotage him — will likely bar him from running.