Blogger Alexander Lapshin has been brought to Baku from Belarus where he was earlier detained.
Lapshin's extradition to Azerbaijan on February 7 occurred hours after the Belarusian Supreme Court upheld a ruling by a lower court to send Lapshin to Baku.
The Russian blogger is wanted by Azerbaijan on allegations of supporting the independence of Azerbaijan's breakaway region of Nagorno-Karabakh.
Belarusian Deputy State Prosecutor Alyaksey Stuk signed the extradition order on January 18.
Lapshin was detained in Minsk in mid-December on the basis of Baku's extradition request.
Azerbaijani prosecutors accuse Lapshin of illegally visiting Nagorno-Karabakh in 2011 and 2012 and calling for the recognition of the breakaway region's independence by posting two statements online, RFE/RL reports.
