Last updated 7.20pm
Russian police detained Kremlin critic Alexei Navalny at a Moscow airport on Sunday, shortly after he landed on a flight from Berlin.
Navalny's spokeswoman Kira Yarmysh confirmed he had been detained, saying on Twitter: "Alexei was taken away by police officers at the border. With no explanation given."
Navalny arrived on Sunday evening after his flight was diverted at the last minute from Vnukovo Airport where his supporters and media had gathered.
Earlier, Russian police detained top Navalny allies at Vnukovo Airport.
This was Navalny's first return to Russia since a near-fatal poisoning in August.
Officials had warned that they would arrest him for breaking the terms of a suspended prison sentence.
Supporters had gathered at Vnukovo airport around 7:30 pm (1630 GMT), despite the airport banning mass events because of coronavirus restrictions.
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With his plane still in the air, police detained top aides including prominent Moscow activist Lyubov Sobol.
Footage shot by local journalists showed police leading her and three others away, while there were reports of at least 10 people detained.
The flight carrying...