![A Pave Hawk helicopter, military personnel and emergency services attend the scene of a helicopter crash on the coast near the village of Cley next the Sea in Norfolk, eastern England, Jan. 8, 2014.](https://i0.wp.com/www.hawaiireporter.com/wp-content/uploads/2014/01/Screen-shot-2014-01-08-at-11.17.40-AM.png?resize=640%2C359&ssl=1)
![A Pave Hawk helicopter, military personnel and emergency services attend the scene of a helicopter crash on the coast near the village of Cley next the Sea in Norfolk, eastern England, Jan. 8, 2014.](https://i0.wp.com/www.hawaiireporter.com/wp-content/uploads/2014/01/Screen-shot-2014-01-08-at-11.17.40-AM.png?resize=300%2C168&ssl=1)
The U.S. military is investigating two deadly helicopter crashes that occurred within a 24-hour period.
The Navy says a helicopter with five people on board went down in the Atlantic off the coast of Virginia Wednesday. Of the four crew members rescued, one died a few hours later. The other three were being evaluated at a hospital.
The search continues for the fifth person in 5 degree Celsius waters. The Navy said the MH-53E Sea Dragon was conducting routine training operations.
In Britain, an investigation is under way in a remote marshland area, after a U.S. Air Force helicopter crashed, killing four airmen late Tuesday.
The Air Force said the Pave Hawk helicopter was on a low-level training mission when it went down more than 200 kilometers northeast of London.