The Petroleum Safety Authority (PSA) has confirmed it has launched an investigation into a North Sea leak at the Statfjord field.
Statoil said normal production has resumed at its Statfjord A platform after an incident last week led to its shut down.
Norway’s Labour Minister Anniken Hauglie said incident offshore must be taken seriously, after a trio of recent incidents.
Fears have been raised over cost-cutting in the oil and gad industry after three separate incidents over the past couple of days.
Statoil has been given until the end of September to deal with a non-conformity discovered on its Statfjord A platform.