"The Motive for the Attack is Unclear"

Posted on the 10 May 2016 by Markwadsworth @Mark_Wadsworth

The BBC surpasses itself with this one:
One man has been killed and three others wounded by a knife-wielding man near Munich, with police investigating a possible Islamist connection.
The man attacked four commuters shortly before 05:00 (03:00 GMT) on Tuesday at Grafing station. One of the victims died of his wounds in hospital. A 27-year-old German man was eventually overpowered by police and arrested.
Some witnesses said he shouted "Allahu akbar" ("God is great" in Arabic) but the motive for the attack is unclear.

From other reports, it is perfectly clear that he is a Muslim immigrant (possibly second generation).