Attacker went on the rampage on a train near Wurzburg targeting 15 people
Three critically injured after an attack with 'cutting and stabbing weapons'
A 17-year-old Afghan refugee has since been shot dead by armed police
Teenager shouted 'Allahu Akbar' in 'probable' Islamist attack, officials say
A teenage Afghan refugee shouted 'Allahu Akbar' before hacking at passengers during an axe and knife rampage on a train in Germany.
The 17-year-old was gunned down by armed police after fleeing from the scene near the city of Wurzburg, 70 miles north of Nuremberg in southern Germany.
Gruesome pictures taken after the attack show the blood-soaked interior of the train.