Sergei Shoigu, Russia's defence minister, has tried to send a "business as usual" message since his deputy was arrested on a bribery charge. On the surface, the timing of the detention on Tuesday of Timur Ivanov, one of Shoigu's 12 deputy ministers, was unexpected, coming when Russia is waging war in Ukraine and the authorities have made discrediting the army a jailable offence. Allegations of graft funding a lifestyle way beyond his means made against 48-year-old Ivanov by the late opposition politician Alexei Navalny's anti-corruption foundation had been in the public domain for more than a year with no apparent fallout.