The cause of the Black Hawk helicopter's crash is unknown. Five other Americans were rescued immediately after the helicopter went down about 20 miles off the coast of Yemen, according to The Wall Street Journal, citing reports from U.S. Central Command.
A USA military Black Hawk helicopter crashed off the southern coast of Yemen while training its crew, leaving one service member missing, officials said.
Officials have not yet identified those onboard the aircraft at the time of the crash or the unit the aircraft belonged to.
A service member is missing after a U.S.
"This aircraft was based and launched from an overseas location [in support of] U.S. Central Command operations", the email said, declining to name the location due to operational concerns.
USA forces have conducted scores of airstrikes in Yemen and carried out occasional ground raids since January 29, when a Navy SEAL - Chief Petty Officer William "Ryan" Owens, 36, of Peoria, Ill. - was killed in the first military operation authorized by President Donald Trump.
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The reported cited the USA army source as saying that this was a routine training event.
The crash isn't the first one for a military helicopter in 2017.
Five of the six USA troops on board were rescued, and the search for the sixth person is ongoing.
Known as al-Qaida in the Arabian Peninsula, the group rose to prominence in 2009 and has taken advantage of a civil war in Yemen to increase its influence in the region.
The crash took place Friday evening.