http://www.bbc.co.uk/news/world-europe-36870874Looks like this time it may not have been ISIS this time, but they're still confirming details, this doesn't seem like a bunch of random acts to me anymore, it's like there's a guerilla war going on in Europe.
I would say we should probably not jump the gun as several investigation are ongoing as at then we can now comment be cause when issues like this happens there are various conspiracies and counter conspiracies coming as a result of that. So until the German Authority comes out with a position or a group claim responsibility for such drastic and unfortunate incident...my 2 cents..,