Russian opposition politician Alexey Navalny is headed back to jail. On Tuesday, Moscow’s Tverskoi District Court sentenced him to 30 days behind bars for repeated violations of Russia’s laws on public assemblies.

Navalny was detained on May 5 in Moscow at Pushkin Square, where he organized an unpermitted demonstration against Vladimir Putin’s fourth presidential term. Police detained about 700 protesters in Moscow on May 5 and more than 1,600 across the country.

Navalny also faces separate charges of disobeying police orders during his arrest on May 5.