OSLO, Oct 2: A man shot dead his three younger sisters in an Oslo suburb, police said on Monday. The sisters, aged 13, 24 and 27, were killed late Sunday in their apartment in Kalbakken, an eastern suburb of the Norwegian capital.

Their 30-year-old brother was arrested hours later after police received a tip from another family member, investigators said. They said the family was of Pakistani origin.

“We also found a firearm but it is not certain whether it is the one used in the killings,” police inspector Terje Kristiansen said.

The suspect was sent to a hospital in Oslo for a medical evaluation, and would be questioned by police on Tuesday, according to news agency NTB.

Investigators said the motive of the murders was unclear but they were looking into whether the crime could have been triggered by a family dispute.

Local residents were in a state of shock on Monday as news of the triple murder circulated in the Scandinavian country. A next-door neighbour, Else Vold, told NTB that the family was well-liked and described one of the sisters as “gentle” and “pleasant”.—AP