Russian opposition leader Alexei Navalny has been detained at home ahead of a planned unauthorised protest in Moscow, his wife says.
“Alexei has been arrested in the entrance to our block of flats,” Yuliya Navalny wrote on Twitter, adding “our plans haven’t changed”.
Mr Navalny earlier called on supporters to attend anti-corruption rallies across Russia.
There have been several arrests at protests in the east of the country.
At least 10 people were detained at a rally in the city of Vladivostok, while four people were also arrested in Blagoveshchensk and at least one other in Kazan.
Prominent activist Daniil Ken said he was arrested as he left his home in St Petersburg on Monday. He urged people to join a rally at the city’s Champ de Mars square. “Go for me, please!” he tweeted.
Mr Navalny was due to attend the rally in central Moscow later on Monday. He was earlier granted permission to hold a rally at Sakharova Avenue but changed the location on the eve of the demonstration to Tverskaya Street, near the Kremlin.