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.

A protest over the Greek government’s response to the nation’s largest ever train crash turned violent on Friday as Scores of youths hurled rocks and gasoline bombs at police.

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.