A radical far-left politician who wants to make peace with Russia's Vladimir Putin looks set to play a key role in regional elections in the former East Germany on Sunday.

Sahra Wagenknecht, 55, born in communist East Germany to an Iranian father and a German mother, defected from the far-left Die Linke to form her own party, BSW, last year.

Wagenknecht has caused a stir in Germany by calling for negotiations with Putin, an end to the government's support for Ukraine and a radical crackdown on immigration.