A search-and-rescue operation was underway Tuesday night off the coast of San Diego for five crewmembers after the crash of an MH-60S helicopter from the USS Abraham Lincoln, a Nimitz-class aircraft carrier about 60 nautical miles from shore, according to a report.

The helicopter was "conducting routine flight operations," and crashed at about 4:30 p.m., Fox 5 San Diego reported. The Navy did not immediately respond to an email from Fox News. The U.S. Pacific Fleet said in a statement one crewmember was rescued.

FILE: An MH-60S Seahawk helicopter performing routine flight operation, July 4, 2018. Image courtesy Petty Officer 3rd Class Thomas Gooley / USS Harry S Truman. (Photo by Smith Collection/Gado/Getty Images) ( Image courtesy Petty Officer 3rd Class Thomas Gooley / USS Harry S Truman. Photo by Smith Collection/Gado/Getty Images)

Multiple Coast Guard and "Navy air and surface assets" are assisting in the search, the report said. 

GET THE FOX NEWS APP

This is a developing story and will be updated