Over 5,000 demonstrators were detained in major Russian cities Sunday, as authorities cracked down on people who defied orders and protested against the detention of opposition leader Alexey Navalny, monitoring groups said.

Why it matters: Navalny’s detention has united Russians from a variety of backgrounds, including those who are against his politics, to protest the authoritarian leadership of President Vladimir Putin, per the New York Times.

  • Russian prosecutors have demanded that social media platforms censor calls to join protests, AP notes.
People with Russian national flags take part in an unauthorized protest in support of the detained opposition leader Alexei Navalny in Novosibirsk, Russia.
People with Russian national flags take part in an unauthorized protest in Novosibirsk. Demonstrators rallied despite police arresting thousands of protesters last week. Photo: Kirill Kukhmar/TASS via Getty Image
Police officers detain a protester during a demonstration in St. Petersburg Sunday. Demonstrators rallied despite police arresting thousands of protesters last week.
Police officers detain a protester in St. Petersburg. Moscow School for Social and Economic Sciences sociologist Konstantin Gaaze told the NYT, “Navalny has, for the first time, sparked a Russian protest movement against the president.” Photo: Sergei Mikhailichenko/SOPA Images/LightRocket via Getty Images
Riot police during an unauthorized protest in Vladivostok.
Riot police at an unauthorized rally in Vladivostok. Photo: Yuri Smityuk/TASS via Getty Images
A police officer detains a demonstrator during an unauthorised protest in support of the detained opposition activist Alexei Navalny in Ordzhonikidze Square in the city of Yakutsk
A police officer detains a demonstrator during an unauthorized protest in the Far East city of Yakutsk in the Republic of Sakha. Photo: Vadim Skryabin/TASS via Getty Images
Law enforcement officers stand guard outside Chistye Prudy metro station prior to an expected rally in support of jailed opposition leader Alexei Navalny in Moscow on January 31
Moscow law enforcement officers stand guard outside Chistye Prudy metro station ahead of a planned unauthorized rally. Authorities shut stations and were restricting movement across the city, the BBC notes. Photo: Natalia Kolesnikova/AFP via Getty Images
Demonstrators and police officers during a protest in support of the detained activist Alexei Navalny in Yakutsk, Republic of Sakha (Yakutia), in the Russian Far East.
Demonstrators and police officers in Yakutsk, where temperatures have hit -39 degrees Fahrenheit. Photo: Vadim Skryabin/TASS via Getty Image
Riot police officers detain a demonstrator during an unauthorised protest in support of the detained opposition activist Alexei Navalny in central Novosibirsk.
Riot police detain a demonstrator in Novosibirsk. Photo: Kirill KukhmarTASS via Getty Images
The scene in St Petersburg ahead of an unauthorized rally in the port city.
The scene in St Petersburg ahead of an unauthorized rally in the port city. Photo: Alexander Demianchuk/TASS via Getty Images
Police officers detain a demonstrator during an unauthorised protest in support of the detained opposition activist Alexei Navalny in Ploshchad Kommunarov Square.
Police officers detain a demonstrator during an unauthorized protest in Yekaterinburg, in the Ural Mountains. Photo: Donat Sorokin/TASS via Getty Images
Police officers detain demonstrators during an unauthorised protest in support of the detained opposition activist Alexei Navalny in central Novosibirsk.
Novosibirsk police officers detain demonstrators. Photo: Kirill Kukhmar/TASS via Getty Images
Police officers detain a demonstrator during an unauthorised protest in support of the detained opposition activist Alexei Navalny in Vladivostok, Russia.
Vladivostok police officers detain a demonstrator. Photo: Yuri Smityuk/TASS via Getty Images
In this photo released by Yulia, wife of Russian opposition leader Alexei Navalny on her Instagram account on Sunday, Jan. 31, 2021.(Yulia Navalny via AP)
Yulia Navalny, Alexei Navalny’s wife, joined protesters in Moscow, Russia. Yulia has been released after she was arrested by police officers who did not properly identify themselves, according to a tweet from Navalny’s team. Photo: Yulia Navalny via AP
(AP Photo/Dmitry Serebryakov)
Police block the street at Matrosskaya Tishina, the penitentiary where Alexei Navalny is being held in Moscow. Photo: AP Photo/Dmitry Serebryakov
Police officers detain a man during a protest on Sunday, Jan. 31, 2021. (AP Photo/Alexander Zemlianichenko)
Moscow police officers detain a demonstrator. Photo: AP Photo/Alexander Zemlianichenko
Police detain a man during a protest against the jailing of opposition leader Alexei Navalny in the Siberian city of Omsk, Russia, on Sunday, Jan. 31, 2021. (AP Photo)
Police officers detain a demonstrator in the Siberian city of Omsk, Russia. Photo: AP Photo
Police detain protesters during a protest against the jailing of opposition leader Alexei Navalny in St. Petersburg, Russia, Sunday, Jan. 31, 2021. AP Photo/Valentin Egorshin)
Police officers detain a demonstrator in St. Petersburg. Photo: AP Photo/Valentin Egorshin
Police officers detain a woman during a protest in Ulan-Ude, the regional capital of Buryatia, a region near the Russia-Mongolia border, Russia, on Sunday, Jan. 31, 2021. (AP Photo/Anna Ogorodnik)
Police officers detain demonstrator in the capital of Buryatia, near the Russia-Mongolia border. Photo: AP Photo/Anna Ogorodnik

Go deeper: Biden’s Russia challenge

Editor’s note: This article has been updated with more photos and the latest arrest total.