I do not consider this the best source of info but I would say after going over the list it is pretty accurate. https://en.wikipedia.org/wiki/List_of_grenade_attacks_in_Sweden
Bombings increased significantly in 2015, with Swedish police investigating around 100-150 explosions. There were over 30 grenade attacks reported in the Swedish city of Malmö alone by August 2015, up from a total of 25 in all of 2014. Malmö police have consequently warned about undetonated grenades...
en.wikipedia.org
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