According to the radio station Ici Lorraine, an extensive rescue operation is underway.
France's defense ministry says the aircraft was a Mirage 2000D fighter jet and that it lost contact with the plane on Tuesday evening, Franceinfo reports.
The search for the second pilot is ongoing.
Witnesses reportedly heard a loud explosion and saw a fireball at around 10:30 p.m. on Tuesday.
A press conference will be held at 9 a.m. in the municipality of Rogéville.
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