Alex Song has completed a permanent move to Rubin Kazan, ending a four-year spell on Barcelona's books.
The 28-year-old spent the last two seasons on loan at West Ham United after falling out of contention at Camp Nou.
A fortnight ago, the Cameroonian was spotted in Russia to undergo a medical with Kazan, and now the club have confirmed that the deal is done.
Song, who has been capped 49 times for the international side, spent six years at Arsenal between 2006 and 2012.