NEW : 20 people are dead and 100 are injured . Indonesia 's railway ministry says one train hit another from behind . Survivors say the first train was stationary when it was struck . A crash involving two trains in central Indonesia Saturday killed 36 people and injured 26 , officials said . The cause of the accident is unclear .
NEW : 20 people are dead and 100 are injured . Indonesia 's railway ministry says one train hit another from behind . Survivors say the first train was stationary when it was struck . The cause of the accident is unclear .