The 28-year-old Keita signed a four-year-deal, which is around €14M, according to Spanish media reports.

"Seydou Keita signed a contract committing him to Barcelona for the next four seasons, or until June 20, 2012," a Barcelona statement read.

Keita was acquired by new coach Josep Guardiola as a replacement for Portugal midfielder Deco, who is set to leave Nou Camp this summer.