The oil-rig helicopter that crashed in Norway, killing 13 people, gave no Mayday call or indicated it was in trouble, a Norwegian investigator has said.

Kare Halvorsen, from Norway's Accident Investigation Board, said their probe has shown no such evidence, but he declined to speculate on the cause of the accident.

The Herald:

The victims - 11 Norwegians, one Briton and one Italian - were aboard the Airbus EC-225 helicopter flying in to Norway from an offshore rig in the North Sea when it crashed on Friday on the tiny island of Turoey outside the western city of Bergen.

READ MORE: Family 'herartbroken' by death of Scot in Norway helicopter crash

Norwegian police have released the names of seven victims, including Iain Stuart from Aberdeenshire in Scotland.

The Herald:

Police spokeswoman Gry Benedicte Halseth said the families of the remaining six victims did not want to their names released.