Athens: Authorities stated that the death toll from the train crash in central Greece has increased to 57.
Konstantia Dimoglidou, the spokesperson for the Greek police told reporters that 48 people are still in the hospital, with six of them in intensive care.
A search and rescue operation is expected to conclude on Friday, Greek Fire Service spokesman Vasilios Vathrakogiannis added.
An investigation is simultaneously underway to determine the causes of the crash -- how and why a passenger train collided head-on with a freight train travelling in opposite directions, Xinhua news agency reported.
A station master has been arrested and charged with manslaughter by negligence.
The government has declared a three-day national mourning until Friday and promised that problems affecting the operation of railways will be addressed to prevent such tragedies in the future.
With inputs from IANS