For the many migrants who live in the centre of Athens, nightfall brings fear of violence.

More immigrants are coming all the time, even as the Greek economy gets worse. With the government seemingly powerless, the jarring clash of cultures is easy for extremists to exploit.

In last month's local elections, a far-right party won a seat on the city council in Athens for the first time.

And as Al Jazeera's Barnaby Phillips reports, tension has been building ever since.