Nyheter reports police have initiated an investigation after a 19-year-old boy died in Oslo on Tuesday.

Oslo police are assisting health authorities to find out why 19-year-old died suddenly.

The preliminary autopsy report does not give a clear answer on the cause of death, but it is less likely that it concerns a source of infection. It has probably happened a type of food poisoning, says section leader Rune Shields by Finance and Environmental Crime Section of the Oslo police.

Police have sealed off the family’s home and seized food, but there is no suspicion that there has been no crime.

We have taken a great deal of products at their home, which will now be analyzed, says Shields.

The 17-year-old sister of 19-year-old is too ill. Her condition has been critical, but during the past day has stabilized, police said.

The 19-year-old was a guest at a restaurant in Oslo before he became ill, but not her sister. As things stand now, it is most likely that food poisoning happened at their home.

Infection Control Superior in Oslo, Tore W. Steen, confirmed that he is involved in the case.