German prosecutors said Wednesday they had opened a probe against three individuals for negligent homicide in the 2017 crash of a German military helicopter in a UN operation in Mali.
"A case on the suspicion of negligent homicide has been opened against three people who are said to have carried out" work on the Airbus helicopter, prosecutors in the southern town of Kempten said.
Earlier, European aircraft maker Airbus said a probe had found that "an improper setting of the helicopter controls was identified by the investigation as one of the factors in the chain of events which have led to this catastrophic outcome".
Two German UN peacekeepers were killed in July 2017 when their Tiger helicopter crashed as they were monitoring fighting in northern Mali.
UN sources in the area quickly ruled out it was shot down, and the German army has since been looking into the reasons for the crash.
German prosecutors said a report from the German Military Aviation Authority has found that "works on the helicopter had been incorrectly carried out during the adjustment of the main rotor control system."
"The faulty adjustment of the rotors led to a situation in which the chopper could no longer be controlled by the crew during a routine flight, leading to the crash."