Arbour has spent several days traveling through Russia's troubled North Caucasus region to examine the human-rights situation in the country.
She met with refugees in Ingushetia and visited Chechnya, where she expressed concern over accounts of abuse by Russian forces.
She also visited Beslan in North Ossetia, the site of the 2004 bloody school siege that left more than 330 people dead.
(ITAR-TASS, Interfax, AP)
The Chechnya Conflict
The aftermath of a December 2002 Chechen resistance attack on the main government building in Grozny (epa)