German train attack: IS releases video of 'Afghan knifeman'

The 17-year-old injured four people with an axe and knife, one critically, in the attack in Wuerzburg on Monday evening. He was shot dead by police.
In the video, a young man brandishing a knife says he is an "IS soldier" preparing for a suicide mission.
German officials say they later found a hand-painted IS flag in his room.
The teenager reportedly shouted the Islamic phrase "Allahu akbar" ("God is great") during the attack.
The self-styled news agency of IS said he had launched the attack "in answer to the calls to target the countries of the coalition fighting the Islamic State".
The attack comes days after a lorry ploughed into a crowd in Nice in France, killing 84 people. The self-styled Islamic State group said one of its followers had carried out that attack.
Read more at BBC