Canada hosts a meeting today of states that share the shores of the Arctic Ocean.
Officials from Canada, Denmark, Norway, Russia and the United States are taking part in talks in Chelsea.
The Arctic Ocean is believed to hold up to 90 billion barrels of oil.
In 2008, the five Arctic nations pledged to avoid territorial conflicts and balance economic opportunities with conservation of the ecosystem.
But a Canadian study has found a large build-up of military assets in the far north.
Research by Robert Huebert of the University of Calgary's Center for Military and Strategic Studies showed the five states have either built or announced 66 combat-capable Arctic vessels intended for or capable of operating in the Arctic, including patrol boats, icebreakers and submarines.
compiled from agency reports