Greek railway workers extended their strike to a second day on Friday, and more protest rallies were planned, amid anger over a devastating train crash that killed at least 57, among them many university students.

Carriages were thrown off the tracks, crushed and engulfed in flames when a high-speed passenger train with more than 350 people on board collided head-on with a freight train late on Tuesday. “The federation has been sounding alarm bells for so many years, but it has never been taken seriously,” the main railworkers union said, demanding a meeting with the new transport minister, appointed after the crash with a mandate to ensure such a tragedy can never happen again. The union said it wanted a clear timetable for the implementation of safety protocols. Questions around the crash - which happened as the two trains were on the same track - involve faulty signalling and maintenance issues.