Three hurt in US helicopter hard landing in Thailand
Embassy spokesman Walter Braunohler said there were no fatalities in the incident, which involved a CH-46 Sea Knight helicopter carrying US personnel taking part in the Cobra Gold joint military drills.
A source close to the exercises said two of the helicopter passengers were believed to need emergency surgery, while one sustained more minor injuries and a further three were unhurt.
Cobra Gold is the largest US multilateral exercise in the Asia-Pacific, bringing together thousands of troops from the US, Thailand and other countries for field training.
The annual drills are a key part of the US military relationship with Thailand, whose air bases and ports remain vital to the American military's logistical network in Asia.