An anti-austerity demonstration in Greece has descended into violence, following the country's second strike in a month.

Protestors hurled home-made petrol bombs, bottles and stones at riot police, who had been deployed across Athens in case the demo turned violent.

Police retaliated with volleys of tear gas and stun grenades.

Clashes broke out after campaigners threw rocks and said they had no place policing a peaceful demonstration.

The nationwide strike was called by the unions, disrupting transport and closing public facilities and services.

The violence, which was fairly limited, lasted about 90 minutes.

The protesters had largely dispersed from the city's central Syntagma Square by mid-afternoon.