Opposition head Friedrich Merz is calling for reforms to Germany's migration laws after a deadly knife attack in which an Afghan man facing deportation is the main suspect - even if they pass with support from the far-right Alternative for Germany (AfD).

The conservative leader wants to impose strict border controls after knife killings in Aschaffenburg this week.

German conservative leader Friedrich Merz has demanded fundamental changes to migration policy and a dramatic increase in deportations after the deadly stabbing in the southern city of Aschaffenburg.