According to the US "Star Trek" and other media reports on the 17th, a U.S. Naval Corps helicopter crashed in Southern California on the 16th local time, causing one pilot to die.

The US "Stars and Stripes" said that the US Marine Corps released the news in a statement on the 17th local time. The statement said that a Marine Corps AH-1Z Viper helicopter had a "flight accident" while performing a routine mission, killing one pilot and injuring another pilot.

Newsweek said that relevant agencies are investigating the accident.