The five Marines who were aboard a helicopter that was reported missing Tuesday during a California storm are dead, the military confirmed.

“It is with a heavy heart and a profound sadness that I share the loss of five outstanding Marines,” Maj. Gen. Michael Borgschulte, commanding general of the 3rd Marine Aircraft Wing, said in a statement. “To the families of our fallen Marines, we send our deepest condolences and commit to ensuring your support and care during this incredibly difficult time.”