U.S. Coast Guard officials said parts of a helicopter that crashed Tuesday off Alabama's coast during a training mission have been recovered and brought up to the surface, the L.A. Times reported.

Officials said they're still searching for three missing crewmen who were aboard the MH-65C Dolphin helicopter when it went down, killing a rescue swimmer, said Capt. Don Rose, commanding officer of the Coast Guard Sector Mobile, according to The Associated Press. The names of the crewmen on the helicopter haven't been released.

Although poor visibility and weather has hampered the salvage-rescue mission, officials said they've recovered the helicopter's tail section and main fuselage, the L.A. Times said.

Our main concern is locating the three remaining crew members, spokeswoman Petty Officer 2nd Class Elizabeth Bordelon told The Associated Press on Wednesday, one day after the helicopter crashed.

Civilians and emergency responders from surrounding counties have pitched in to help with the search and recovery effort. A towing vessel named the Ben R. Johnson was dispatched on Wednesday to help pull wreckage from the water.

The twin-engine, single-rotor helicopter ran into trouble Tuesday evening while flying over the choppy bay near Point Clear, Ala., just after leaving an aviation training center in nearby Mobile. The Coast Guard said the crewmen had extensive survival training and were equipped with a dry suit. The helicopter usually carries two pilots, a flight mechanic and a rescue swimmer, the AP reported.