A petrol bomb is thrown at riot police during a demonstration marking a year from Greece’s deadliest train crash, in Thessaloniki, Greece, February 28, 2024. REUTERS/Alexandros Litsardakis

Police scuffle with protesters in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

Police officers stand amid smoke from a molotov cocktail, thrown by protesters, in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash, which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

A message is writen on the road in front of the Hellenic train headquarters during a strike to mark the one-year anniversary of a deadly train crash which killed 57 people and demanding pay rises, in Athens, Greece, February 28, 2024. The message reads:"Our lives". REUTERS/Louiza Vradi

Relatives of the 57 victims of Greece's deadliest train crash, take part in a memorial service to mark a year from the crash, in Tempi, Greece, February 28, 2024. REUTERS/Alexandros Avramidis

Students chant slogans, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

Riot police march past a placard placed in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

A relative of one of the 57 victims of Greece’s deadliest train crash, reacts during a memorial service to mark a year from the crash, in Tempi, Greece, February 28, 2024. REUTERS/Alexandros Avramidis

Police scuffle with protesters in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

Riot police detain a protester during a demonstration marking a year from Greece’s deadliest train crash, in Thessaloniki, Greece, February 28, 2024. REUTERS/Alexandros Litsardakis

Riot police detain a protester during a demonstration marking a year from Greece’s deadliest train crash, in Thessaloniki, Greece, February 28, 2024. REUTERS/Alexandros Litsardakis

Police scuffle with protesters during a 24-hour strike to mark the one-year anniversary of a deadly train crash which killed 57 people and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louiza Vradi

Names of victims are written in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

Police officers stand guard in front of the Hellenic train headquarters during a strike to mark the one-year anniversary of a deadly train crash which killed 57 people and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louiza Vradi

Flowers are arranged as the number 57, referring to the 57 victims of Greece’s deadliest train crash, as relatives take part in a memorial service to mark a year from the crash, in Tempi, Greece, February 28, 2024. REUTERS/Alexandros Avramidis

Rescuers light candles outside a chapel during a memorial service to mark a year from Greece's deadliest train crash, in Tempi, Greece, February 28, 2024. REUTERS/Alexandros Avramidis

A person holds a placard reading "Murderers, no to the cover-up", during a memorial service to mark a year from Greece’s deadliest train crash, in Tempi, Greece, February 28, 2024. REUTERS/Alexandros Avramidis

Protesters argue with riot police during a demonstration marking a year from Greece’s deadliest train crash, in Thessaloniki, Greece, February 28, 2024. REUTERS/Alexandros Litsardakis

Police officers try to disperse protesters with tear gas, near the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

Police scuffle with protesters in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki

People take part in a protest during a strike to mark the one-year anniversary of a deadly train crash which killed 57 people and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louiza Vradi

People take part in a demonstration marking a year from Greece’s deadliest train crash, in Thessaloniki, Greece, February 28, 2024. REUTERS/Alexandros Litsardakis

A student writes the names of the victims, in front of the Greek parliament, during a 24-hours strike to mark one-year anniversary of a deadly train crash, which killed 57 people, and demanding pay rises, in Athens, Greece, February 28, 2024. REUTERS/Louisa Gouliamaki