Experts believe more people could have died, after a helicopter ditched into the North Sea killing four people, but added that the "skill of the pilots" played a part in saving lives, according to the British Airline Pilots Association.
Speaking to The Daily Telegraph, a spokesman said: "It is too early to say exactly what happened, but ditching a helicopter on water is extremely difficult.
"The skill of the pilots in dealing with what looks to have been a catastrophic power failure at low altitude almost certainly ensured that more people didn't lose their lives."
More top news
The report described the attackers as ‘Takifiri gunmen’.
Reports described the assailants as ‘Takifiri gunmen’, a term previously used to describe the Islamic State group.
The weekend is set to start off chilly and fine, but wet weather is anticipated later in the day.