The agency that controls airports in the Northern Marianas says it is worried about how increased military activity on the island of Tinian could affect operations at the island's sole airport.
The US military plans to establish a series of live-fire and combat training areas on two thirds of the island.
But the executive director of the Commonwealth Ports Authority, Edward Deleon Guerrero, says his agency is concerned that the training will interfere with the operation of Tinian's only airport.
Our correspondent, Mark Rabago, says the authority hasn't said exactly how operations could be affected, but transporting troops and equipment could use a lot of its resources.
"If an airfield is being used by the military the commercial flights coming in will have to halt or be re-routed somewhere else and this could pose a problem for CPA."
Our correspondent in the Northern Marianas, Mark Rabago.