( CNN ) A medical helicopter carrying at least three people crashed late Thursday in Eufaula , Oklahoma , the Federal Aviation Authority said . It was flying from Tulsa to McAlester when it went down west of Lake Eufaula , near the Canadian River . Three employees from medical air transport company EagleMed LLC were on board , according to FAA spokesman Lynn Lunsford . FAA investigators are headed to the crash scene . The McIntosh County Sheriff 's Office is handling the crash for local law enforcement , but a spokeswoman said early Friday that it had no information to give out so far . Earlier this week , an Army Black Hawk helicopter crashed in waters off the Florida Panhandle . All 11 service members aboard are believed dead , an Air Force official said Thursday . The military has been working to recover the helicopter , which searchers found at the bottom of the Santa Rosa Sound near Eglin Air Force Base , as well as the bodies of all seven Marines and four Louisiana Army National Guard members who were aboard . CNN 's Greg Botelho contributed to this report .
The ambulance was registered to an ambulance ambulance company . It was en route from hull to McAlester .