Alexei Navalny 2013 mayoral campaign

Russia's prison service says it has orders to detain Alexey Navalny, a statement made days before the opposition politician is due to return to Russia after recuperating abroad from a suspected FSB poisoning.

Russian opposition leader Alexey Navalny, who is currently recovering in Germany from a nerve-agent attack he blames on the Kremlin, said he plans to return to Moscow despite threats by the authorities to imprison him upon his arrival.

Navalny said in an Instagram video post Wednesday that he has a ticket to Moscow on Jan. 17.