In the low-level buildings of Campus Risbergska in Orebro, a 35-year-old man stalked the corridors looking for his targets. 

He chose to spare some from death. Others were shot with his high-calibre hunting weapon. But three days after Sweden’s worst mass shooting, the names of many of the victims have still not been made public. Nor has the official identity of the killer, who later shot himself.

Police and local authorities have also been reluctant, so far, to provide a suspected motive. However, there are clues that the gunman may have targeted migrants – something likely to inflame growing tensions in a country growing more Right-wing.

The killings took place at a large learning centre popular with non-Swedish residents who want to integrate. Mandatory language tests were proposed recently in Sweden by a Right-leaning government that has begun to take a hard line on migration.

In a blurry video showing the attack unfolding a voice can be heard between the shots, shouting in Swedish: “You must leave Europe.”