Two men have been charged with the murder of Russian opposition leader Boris Nemtsov.
Zaur Dadayev and Anzor Gubashev, both of Chechen origin, are accused of shooting Mr Nemtsov, 55, near the Kremlin in Moscow on 27 February.
A judge said Dadayev has admitted involvement in the killing and will be held in custody until 28 April.
Dadayev was a deputy commander for a battalion attached to the Chechen interior ministry, while Gubashev worked for a private security company in Moscow,RIA Novosti news agency said.
Three other suspects also appeared with them in Moscow’s Basmanny court on Sunday.
Court officials said the three men -Gubashev’s younger brother Shagid Gubashev, and two others named only as Bakhayev and Eskerkhanov – have not been charged, and their case will be handled by a separate judge.
Mr Nemtsov, a former deputy prime minister and long-time critic of Russian President Vladimir Putin, was shot four times in the back as he walked with his girlfriend along a bridge in the heart of the capital.
No information has emerged as to the possible motive of the suspects.
Mr Nemtsov’s allies believe his assassination was ordered by the Russian government to silence dissenters.
The allegation has been strenuously denied by the Kremlin.
The killing sent shockwaves through the country’s opposition and sparked international condemnation.
Investigators have suggested the killers wanted to destabilise Russia, which is facing its worst stand-off with the West since the Cold War.
They are investigating several motives, including possible connections to Islamic extremism and Mr Nemtsov’s personal life.
The chief witness to the killing was Mr Nemtsov’s Ukrainian girlfriend, Anna Duritskaya, who has now left Russia.
His death sparked protests in Moscow, with people carrying placards declaring “I am not afraid” and “He died for Russia’s future”.
On Tuesday, hundreds of mourners queued to see his body lying in state in central Moscow ahead of a burial at the Troekurovskoye cemetery on the outskirts of the city.
Former British prime minister Sir John Major was among the European politicians and diplomats who attended the funeral.