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.

Greek mass protests and a general strike Friday marking the second anniversary of a deadly train disaster morphed into violent Athens clashes between police and hundreds hooded, black-clad young protesters.

Air, sea and train transport was halted and mass protests were planned in Greece on Friday in anger over a perceived lack of justice two years after the country's worst-ever train crash killed 57 people.