Several of the train 's 35 passengers were seriously injured and are receiving hospital treatment . The train collided with a maintenance crane on the track , police say . The collision occurred near the city of Offenbach , close to Frankfurt . The bomb exploded and two construction workers died , police say .
The train collided with a maintenance crane on the track , police say . The collision occurred near the city of Offenbach , close to Frankfurt . The bomb exploded and two construction workers died , police say .