Three people died and 13 were injured when a German commuter train collided with a maintenance crane Friday morning , German police said . The collision occurred on the track near the city of Offenbach , outside Frankfurt , police said . The driver and two construction workers were killed . Several of the train 's 35 passengers were seriously injured and are receiving hospital treatment . German authorities are investigating the cause of the accident , police said . The train , a regional service , was traveling from Frankfurt to Hanau .
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 .