Russian opposition politician Alexei Navalny has been detained after arriving at Moscow's Sheremetyevo airport after returning from treatment abroad for a suspected poisoning attempt by Russia's FSB spy agency. Navalny, whose investigations into corruption in Vladimir Putin’s inner circle have sparked protests and angered the country’s most powerful men, had vowed to return home despite signs the Kremlin was preparing to arrest him
Alexei Navalny detained at airport on return to Russia