As usual, a dedicated look reveals actually quite a bit of media coverage, most of it following an AFP wire report..., I've seen recent reports on the situation in Malmö, long a hotspot of gang- and immigrant-related crime, in German news. I'm sure its more in Swedish sources.
So the issue is real, but as always my bullshit meter pegs over claims that something is "not being investigated and reported on, because reasons"...
In my defense, I a. haven't claimed that there was no reporting of it because of some conspiracy, and b. I did search the one or other German news outlet (not the news agencies however) and found absolutely nothing on the combination of "bomb" or "IED" and "Sweden". That I'm largely cut off from news except for the interwebs certainly doesn't help. Still, I find the media echo, well, remarkably faint.
That being said, thank's a lot for digging up all the reports, it's much appreciated.
You're trying to find news on German news outlets with English keywords?
Schweden + Bomben
Schweden + Explosionen
yields a lot.