Putin Opponent Nikolay Koblyakov Detained in Sofia

Nikolay Koblyakov, described as an opposition-affiliated Russian businessman, has been arrested at Sofia Airport, authorities say.

Private national channel NOVA TV reports the operation targeting Koblyakov was carried out on Tuesday evening.

Moscow had issued in 2013 a red notice for Koblyakov over an alleged criminal offense.

On Tuesday the businessman arrived in Sofia flying from French capital Paris and was detained on the passport control checkpoint.

He has a dual Russian-French citizenship and is the co-founder of the human rights organization Russie-Libertes (Free Russia) based in Paris.

Bilyana Kotsakova, Koblyakov's lawyer, was quoted as explaining the wording of the Interpol notice was "too vague".

She also pointed a quick reference on Interpol's website produced no results containing her client's name.

The entrepreneur himself wrote on Facebook that he did not understand why he had appeared on the international warrant list.

The Russian media outlet Rosbalt reported he is facing extradition to Russia.

Koblyakov has been known for his criticism at the policies of Russian President Vladimir Putin. He left the country in 2010 after being summoned for questioning by interrogators.