Riot police have fired volleys of tear gas, stun grenades and water cannons at protesters hurling gasoline bombs and smashed-up paving stones in Athens.

Hundreds of thousands of people rallied in cities and towns across Greece on Friday to demand justice on the second anniversary of the country’s deadliest-ever train crash, and striking workers grounded flights and halted sea and train transport.

Hooded attackers threw firebombs at police on Friday as 200,000 people demonstrated in Athens to mark the second anniversary of Greece's worst rail accident. Opinion polls indicate that most Greeks