We, the undersigned, express our grave concern over reports that two Chechen men were arbitrarily detained by the police in the Russian city of Nizhny Novgorod and forcibly transferred to Chechnya. The Russian authorities should immediately establish their whereabouts, ensure their safety and secure their release unless they are charged with internationally recognisable criminal offence. The men are at grave risk of torture and other ill-treatment and there is a risk to their lives.