Black Hawk helicopter

A missing Black Hawk carrying 10 crew members is believed to have crashed into the sea off a southern island after objects appearing to be aircraft parts were spotted in the area, an official said.

Officials say they've found only debris and human remains in the search of the area where a helicopter crashed in Florida Tuesday night with 11 people aboard.

Seven Marines and a crew of four were aboard the helicopter, which had been on a training exercise at Eglin Air Force Base in the Florida Panhandle.