Prosecutors are investigating the link between bombing and double homicide

But the prosecutor does not want to comment on the case of gang conflicts.

- Of course, you investigate connections when it is such a serious crime. But I have no further comments, she says.

Nor does Chief Prosecutor Torsten Angervåg in Norrköping want to comment on a possible link to a gang conflict. But it is not uncommon for the gang to change their name or for criminals to leave one group to go to another - sometimes even a former rival, according to Angervåg.

- For over a decade, various network configurations have rivaled Norrköping and Östergötland, and above all Linköping, and across the county borders as to Örebro, he says.