On Tuesday evening, a UH-60 Black Hawk went missing off the Gulf Coast of Florida, carrying seven Marines and four soldiers. According to a military official, the helicopter disappeared during a "routine night training mission" that was conducted in heavy fog. A second Black Hawk aircraft involved in the mission reportedly returned safely to its base without incident.

"At this time, all are missing," Andy Bourland, spokesperson for nearby Eglin Air Force Base, told the AP. He added that debris from the missing Blackhawk was spotted in the water by search-and-rescue teams on Wednesday morning.

Base officials said the Marines were from Camp Lejeune in North Carolina, and the soldiers were from a National Guard unit based in Hammond, Louisiana.

A heavy fog advisory hampered the search early on Wednesday morning, with recovery crews continuing their work throughout.

Sara Vidon, another spokesperson for the Eglin base, told USA Today that human remains had washed up on the shore, but refused to say how many bodies had been located or release the names of those involved in the crash.

"This is still considered a search and rescue mission," Vidon told Reuters.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.