CAMP PENDLETON, Calif. — A Marine Corps helicopter crashed Wednesday afternoon at the sprawling coastal base of Camp Pendleton, injuring the six personnel aboard.

The helicopter belonging to the 3rd Marine Aircraft Wing at Camp Pendleton went down at about noon in the northern section of the San Diego County base, said 1st Lt. Maureen Dooley, a spokeswoman at the Marine Corps Air Station Miramar.

Officials did not immediately release details about the injuries.

At least three of the injured were taken to nearby Scripps Memorial Hospital La Jolla in San Diego, about 30 miles south of the base, hospital spokeswoman Lisa Ohmstede said. She said she also couldn’t discuss their injuries and she didn’t know what other hospitals took in patients from the crash.

The UH-1Y helicopter, known as a Yankee Huey is a modernized variant of the decades-old UH-1 design by Bell Helicopters.

Wednesday was sunny and hot in the county so it was unclear if weather played a role. Dooley said there will be an investigation into the cause of the incident.