A Russian court has ordered Kremlin critic Alexei Navalny to be kept in jail and rejected his appeal against his detention.
Mr Navalny was remanded in custody for 30 days on 18 January for alleged parole violations that he denies.
He could face years in jail.
The West has called on Russia to release him and tens of thousands of Russians protested against his jailing on Saturday.
Mr Navalny's allies have called for new protests this weekend to demand his release.
Earlier, Mr Navalny told the judge that he had not been allowed to speak to his defence lawyer one-to-one since being detained on arrival back in Russia on 17 January.
In response to Mr Navalny, the judge gave him five minutes to speak to his lawyer via video link and asked prison guards to leave the room so that he could talk privately.
Several allies of Mr Navalny were taken into custody early today after police raided their apartments and offices ahead of planned demonstrations.
The searches were connected to a criminal investigation launched by the interior ministry over alleged violations of coronavirus restrictions during protests last week, his aides said.
The opposition has called for fresh demonstrations on Sunday to demand freedom for Mr Navalny, who was arrested on his return from Germany where he had been recovering from a poisoning attack.
Ivan Zhdanov, the head of Mr Navalny's FBK Anti-Corruption Foundation, said prominent aide Lyubov Sobol and Mr Navalny's brother Oleg were detained for 48 hours as suspects.
Ms Sobol's lawyer Vladimir Voronin said both she and Oleg Navalny were questioned by police during the night.
Searches were also carried out at the flat of Mr Navalny's wife Yulia, and in the office of FBK, which is known for its investigations into the wealth of Russia's elites.
Police also arrived at the home of Mr Navalny's doctor Anastasia Vasilyeva, who was also detained for 48 hours.
In a video posted on Twitter by Ms Vasilyeva's press secretary, the doctor is playing Beethoven on the piano as people in uniform arrive at the door.
According to Mediazona, a news website that focuses on opposition detentions, police carried out at least 18 searches.
