FAA spokesperson Lynn Lunsford said the crash happened at about 11:25 p.m. near the town of Stidham.

Lunsford said the helicopter with three EagleMed employees on board was headed from Tulsa to McAlester when it went down west of Lake Eufaula.

McIntosh County Emergency Management Director Wesley Dawson said the crash site is about a mile from a rarely used county road in trees on a 10,000 acre ranch. Muddy conditions made it difficult for rescue workers to get to the crash site.

They used the helicopter's GPS and Emergency Locator Beacon to locate the crash site and Dawson said they found the helicopter on its side. 

There is no word on the condition of the two survivors, but Dawson said one walked to a waiting ATV while the other had to be carried out on a backboard. He says they are waiting on the state Medical Examiner's Office before removing the body from the wreckage.  

Names of the victims have not been released. He says no patient was on board the helicopter and it was en route to its home base in McAlester.

The helicopter was a Eurocopter AS350.

Dawson says National Transportation Safety Board and FAA investigators are en route to the crash site.