17yr Old Afghan Refugee Attacks And Injures 22 People on a in Germany

A teenage Afghan refugee who shouted 'Allahu Akbar' before hacking at passengers during an axe rampage on a train in Germany last night had a hand drawn ISIS flag in his bedroom.  
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.
As many as 19 passengers needed hospital treatment while three victims are fighting for their lives after being attacked with 'cutting and stabbing weapons'. Officials have said it was 'probably' an Islamist attack.
An eyewitness said the train, which had been carrying around 25 people, looked 'like a slaughterhouse' after the attack, with blood covering the floor. 

Now it has emerged that following a police search of the attacker's bedroom, an ISIS flag was found. 
It was confirmed by the Bavarian interior minister Joachim Hermann, who also said that two of those caught up in the attack were critically injured and that a Chinese family were among the injured. 
He confirmed that the teenager came to Germany two years ago as an unaccompanied minor, and applied for asylum in March. 
He lived in a home for teenage refugees until two weeks ago when he was placed with a foster family. 
Meanwhile an eyewitness, who declined to give his name, said he saw people crawl from the carriage and ask for a first-aid kit as other victims lay on the floor inside. 
The onslaught started on the train from Treuchtlingen to Würzburg as the service stopped at Würzburg-Heidingsfeld.
As well as the three critically injured victims, one other passenger is believed to have non life-threatening injuries while 14 others suffered minor injuries or shock.
The attacker was eventually shot dead by police after running from the train.