Russia's president has said corruption is a threat to national security
The deputy head of the Russian Supreme Court has resigned after his son was arrested on suspicion of accepting a bribe from a suspect due to face trial.
Alexander Karpov's son, Vladimir, was detained on Saturday in Oryol after allegedly accepting $28,000 (£19,000) from a local resident, reports said.
The judge, who oversees criminal cases, said he had not seen his son for five years and denied any impropriety.
A court spokesman said the resignation was a matter of judicial etiquette.
In July, Russian President Dmitry Medvedev described corruption in his country as a threat to national security.
Russia is among the countries which have not signed the Organisation for Economic Co-operation and Development's convention against bribery and is frequently criticised by anti-corruption watchdogs.