For more analysis, we are joined by Ansgar Graw in Washington. He is a senior political correspondent for the German national newspapers -- "Die Welt", and "The Welt on Sunday".

Q1: Hi Ansgar, police have just confirmed the attacker was an 18-year-old Iranian-German dual national who lived in Munich. What does that tell you about his possible motive for the shooting?

Q2: Monday's stabbing was also perpetrated by a teenager. Is this a sign that young migrants are being marginalised in Germany? Will Merkel's relaxed migrant policy come under pressure once again?