The plane crashed at 3:23 p.m. PDT Tuesday during a routine training flight, according to a statement released by NAS Whidbey. The names of the flight crew have not been released.

Following the incident, the Navy launched a US Navy MH-60S helicopter to locate the crew and examine the crash site. However, as of 7 p.m. Tuesday, the condition of the crew was unknown.

Wednesday morning, weather conditions near the search area were reported as low clouds, precipitation, icing and turbulence, according to Leidos Flight Service.

A temporary flight restriction was placed above the search area, from the surface to 10,000 feet, to protect aircraft participating in the effort. Pilots in the area have been advised to check NOTAMs for further details.

The Boeing EA-18G Growler is a variant of the F/A-18 that incorporates electronic attack technology, including tactical jamming pods and communications countermeasures.

The cause of the accident remains under investigation.

This is a developing story.