A man charged with the killing of Russian opposition politician Boris Nemtsov has told the court he was beaten and pressured to confess.

Five people have been detained in connection with Nemtsov's shooting on Feb. 27. Zaur Dadaev was the only one who, according to a judge and investigators, confessed to the killing.

Russian news agencies on Wednesday quoted Dadaev as telling the court that he had been abducted, beaten and pressured to confess to the shooting.

At a court hearing in March, Dadaev didn't admit guilt in the courtroom and later retracted his confession while a human rights activist who visited Dadaev in jail last month talked about signs of torture on Dadaev's body.

Nemtsov's killing just outside the Kremlin's walls shocked Russia's already beleaguered opposition supporters.