Imprisoned Russian opposition leader Alexei Navalny located in penal colony

Russian opposition leader Alexei Navalny is serving a 19-year prison term (AP)

Associates of imprisoned Russian opposition leader Alexei Navalny said on Monday that he has been located at a prison colony above the Arctic Circle, nearly three weeks after contact with him was lost.

Mr Navalny, the most prominent foe of Russian President Vladimir Putin, is serving a 19-year sentence on charges of extremism.