Around 4:30 p.m. Sunday, emergency crews responded to a helicopter crash at Kenosha Regional Airport in Wisconsin.
Kenosha police told WTMJ in Milwaukee that there was one man in the helicopter at the time of the crash, and that the pilot was taken via Flight for Life to a Milwaukee area hospital.
Authorities have not yet released the condition of the victim involved in the crash.
According to eyewitnesses on the scene, the helicopter, which was no more than 10 feet off the ground, lost a rudder and crashed into the ground.
"We saw the helicopter, and it appeared that a large piece of it came off," a witness said. "It started to gyrate pretty wildly, and then it crashed very hard."
The Federal Aviation Administration is investigating the crash, and no cause has yet been determined in the accident.