German police has joined in the investigation after the Vienna terror attack, conducting raids in several German states. German officers believe that the Vienna Islamist who carried out the attacks, Kujtim Fejzullai, was linked to Islamists in Germany.

Fejzullai is an ethnic Albanian whose family emigrated to Austria from Macedonia. Macedonian police also said that it is cooperating with the Austrian services. Fejzullai would visit Macedonia every year, as many Albanian emigrants do. During the attack on Monday evening, four civilians were killed and 14 people were injured.