Berlin, Germany (CNN) -- A U.S. military Black Hawk helicopter crashed in Germany on Wednesday, killing three crew members, U.S. Army public affairs specialist Bruce Anderson said.
A police officer in the German state of Hesse put the crash site near Darmstadt, south of Frankfurt, near a helicopter landing site in Mannheim.
Names of the victims were being withheld pending notification of relatives, Anderson said.
The cause of the crash was under investigation, he said.
The state of Hesse is in west-central Germany.