The arrest of an Afghan asylum seeker suspected of killing two people in a knife attack targeting children in a German park has prompted calls for a much tougher migration stance and fired up campaigning for Germany's Feb.

Police identified the suspect as an Afghan man. Politicians gearing up for an election responded with comments about migration and law and order.

A 28-year-old man from Afghanistan was arrested following a knife attack on Wednesday in a park in the German city of Aschaffenburg in which two people were