A Russian biker group, famed for their patriotism, have set off from Moscow to Berlin, hoping to recreate the route taken by the Red Army 70 years ago, visiting the graves of Soviet soldiers killed during the war.

However Poland have called the trip a "provocation" and have said they will ban members of the Night Wolves biker club from entering their country.

The bikers paint themselves as patriots - but their club has been placed on the US sanctions list due to its members' staunch support for President Putin, and for rebel fighters in eastern Ukraine.

Moscow correspondent Sarah Rainsford has been to find out more about the group that some call Vladimir Putin's Hell's Angels.