A double-digit score for the anti-immigrant Alternative for Germany (AfD) party in a Berlin city vote would be seen around the world as the rebirth of the Nazis, the mayor of the German capital has warned.
The right-wing AfD has gained support as voters become increasingly uneasy with Chancellor Angela Merkel's open-door refugee policy, which saw about one million migrants arrive in Germany last year.
A poll published on Thursday showed the party was expected to get 14 per cent of the vote in Berlin - a historically left-wing stronghold.
![Petry has seen a surge in popularity for her AfD party. Photo / AP](https://www.nzherald.co.nz/resizer/v2/JAN7ZCEWTZLWLOPMEYOZT6G54M.jpg?auth=d0d3b1ef064d0bae56f10c2ca42b439c9f8346a1c4301d906b6dfe363089c297&width=16&height=9&quality=70&smart=true)
"It would be seen around the world as a sign of the return of the right-wing and the Nazis in Germany," Berlin Mayor Michael Mueller, a Social Democrat (SPD), wrote on Facebook on Thursday.