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.

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.

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.