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Kentucky helicopter crash: Deaths feared after military aircraft collision
The military helicopters were involved in a routine training mission when the incident happened.
www.bbc.com
A number of people are expected to have been killed after a US Army helicopter crash in Trigg County, Kentucky.
The state's Governor Andy Beshear said it was "tough news" with "early reports of a helicopter crash and fatalities are expected".
Local news reports say the incident happened at about 21:35 local time (01:35 GMT), and as many as nine people may have been killed.
Local military confirmed it was their helicopters involved in the crash.