United States President Barack Obama has blocked a privately-owned Chinese company from building wind turbines close to a Navy military site in Oregon due to national security concerns.
The rare presidential order to divest interests in the wind farms comes as Mr Obama campaigns for a second term against Republican Mitt Romney, who has accused him of being soft on China.
The Obama adminsitration says Ralls Corp, which had been installing wind turbine generators made in China by Sany Group, has four wind farm projects that are within or in the vicinity of restricted air space at a naval weapons systems training facility.
The company says it will challenge the action in court.
