Four of those on board the helicopter have been rescued, according to officials.
US Coast Guard officials said they responded to a downed aircraft report at about 11:00.
In a bizarre coincidence, the incident came a day after another US military helicopter crashed in the county of Norfolk, England, killing four people.
The aircraft in Wednesday’s incident went down 18 nautical miles east of the Virginia coast. The cause of the crash is not yet known.
Petty Officer David Weydert said that the missing fifth person was still being sought.
The Coast Guard cutter Shearwater and two MH-60S helicopters are taking part in the search.
The condition of the four rescued personnel has not been given.
The downed helicopter, assigned to Helicopter Mine Countermeasures Squadron 14 (HM-14), was on a routine training mission, the commander of Naval Air Force Atlantic said in a statement.
Norfolk is an important hub for the US military, and is home to Naval Station Norfolk, the largest naval complex in the world.
r5Eukw1AVYASydney has welcomed 2025 with a spectacular fireworks display - cheers erupted as the clock struck midnight…
Following an eight-year legal battle, Angelina Jolie and Brad Pitt have reached a divorce settlement,…
Former President Jimmy Carter died on December 29 at the age of 100 after spending several…
Georgia’s outgoing president Salome Zourabichvili refused to step down on December 29, saying she was…
The bald eagle has been officially declared the national bird of the United States, after…
Dozens of passengers have survived a crash involving a plane carrying 69 people in Kazakhstan,…