“A 14-year-old girl was this weekend subjected to sexual abuse by four boys at a playground in Rosengård. The boys, who are all under 15, have been questioned by police and have admitted the offence," the post read.
"The punishment must be surgical castration and deportation."
On Monday, Karlsson, who is the district head of the Sweden Democrats in Jämtland and Härjedalen counties, confirmed to Swedish newspaper Expo that he had penned and published the demand.
“I wrote it and I stand by it,” Karlsson told Swedish paper Expo on Monday.
The incident to which the post alluded took place at a Malmö playground during last weekend.
One of the boys involved was 12-years-old. According to Expo there has been no information anywhere which contains the nationality of the young suspects.
Surgical castration entails the removing of the testicles. However, Karlsson was unwilling to comment any further on his suggestion to the newspaper, saying that he'd “gain nothing from speaking to reporters”.
However, Sweden Democrat spokesperson Martin Kinnunen told Expo that surgical castration of under aged sex offenders is not an issue the party is currently pursuing.
“From the party's view this is not a policy we are pursuing. Neither is the deportation of 12-year-olds but it is hard to say anything about what will hypothetically be possible," he said.
"We have spoken before about lowering the age of criminal responsibility to 12 years of age. When talking of deportation there are many factors to be considered, so it is hard to say."