TerrorismHamburg knife attacker was 'known' radicalTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoTerrorism07/29/2017July 29, 2017Hamburg authorities have said that the suspected knife attacker was known to them as a radical Islamist. Before being detained, the suspect killed a man and injured six others in a supermarket.https://p.dw.com/p/2hLucAdvertisement