The Athens Prosecutor's Office has ordered an urgent investigation into an incident involving a suburban train that almost entered the metro network in the Doukissis Plakentias area last week.
There will be no passenger train services on Thursday due to a 24-hour strike, as a union representing workers is demanding that safety upgrades are implemented
Greek Fire Service investigative officers and a senior officer also face charges for breach of duty.
Operator Hellenic Train said no serious injuries were reported. Routes along the Oinoi - Halkida - Oinoi line will be covered by buses