An ax-wielding man who attacked several people on a train in southern Germany has been shot dead by police Wuerzburg police said four passengers who were attacked are in serious condition The assailant, armed with a knife and an ax, was identified as a 17-year-old Afghan man living in Ochsenfurt, Bavaria Bavarian Interior Minister Joachim Herrmann said The authorities were still investigating the motive of the attack and were looking into reports that the suspect had yelled out "an exclamation" during the rampage. Some witnesses had heard the suspect shout "Allahu Akbar" during the attack