While the troubled district of Rosengård and its surrounding area still suffers the most, those behind the attacks are increasingly attacking venues in the city centre, with an attack on a café on Dag Hammarskjöld's Square near the Western Harbour district, outside nightclubs on Stortorget, Lilla Torg, and Adelgatan in the city centre, and outside a restaurant in Värnhem.
3. The explosives used have become more powerful
"There have been three distinctly different trends," Norling told The Local. "First it was hand grenades, then bangers, then home-made devices."
From 2015 to 2017, the blasts were primarily caused by hand grenades left over from the civil war in the former Yugoslavia. While the use of military explosives on the city streets may seem alarming, Norling pointed out that the grenades were old and had lost potency.
"We believe it was simply because there were hand grenades available," he said. "One or several people got their hands on hand grenades and they were used until they ran out or didn't work any more."
READ ALSO: Why Swedish gangs are using hand grenades
A hand grenade left over from the Balkan War. Photo: Mikael Fritzon/TT