A U.S. Navy helicopter crashed Tuesday afternoon off the coast of San Diego, California, U.S. Navy's 3rd Fleet announced, adding that the Coast Guard and Navy were conducting search and rescue operations by sea and air.
"An MH-60S helicopter embarked aboard USS Abraham Lincoln (CVN 72) crashed into the sea while conducting routine flight operations approximately 60 nautical miles off the coast of San Diego at 4:30 p.m. PST, Aug. 31," the fleet's commander said in a statement.
The statement did not reveal how many people were on board and whether there were any casualties, saying "more information will be posted as it becomes available."