Olof Lundh at Expressen writes that the pseudonymous blogger “Mats Hård” in reality is the two Aftonbladet journalists Magnus Herbertsson and Fredrik Ihse. They previously ran a website at www.avspark.net, which now coincidentally is redirected to Mats Hård’s blog. Resumé also writes about the story today.
Update: Herbertsson denies any involvment (surprise).