From the BBC:

Swiss voters go to the polls on Sunday after a general election campaign marred by riots and accusations of racism.

The right-wing Swiss People's Party (SVP), already the largest party in the parliament, is leading in the opinion polls and now expects at least 27% of the vote.

But the party's campaign has focussed almost entirely on immigrants.

Its controversial poster, showing three white sheep kicking a black sheep out of Switzerland, brought sharp criticism from the UN's special rapporteur on racism, Doudou Diene.

An even more graphic SVP video contrasts the "heaven" of a Switzerland in which trains run on time and families hike in the Alps, with the "hell" of veiled Muslim women, immigrant teenagers attacking Swiss girls and black men standing idly in the street.