Train smash: A case of 'human error' in Germany ( Photo 2 of 6 )

Wolfgang Boehmer told journalists that the disaster late Saturday night was probably caused by one of the trains ignoring a red stop light on the section of single track where the crash occurred at high speed. "It's likely the stop signal wasn't respected. It's not normal that two trains were running on the same track," Boehmer said. Federal police official Ralf Krueger told a press conference however that accident investigators had yet ...