A U.S. Navy MH-60 Seahawk crashed shortly after takeoff on Friday while conducting routine operations in the Philippine Sea.
It was not immediately clear how many sailors were injured, but they were in stable condition.
The Ronald Reagan Strike Group was performing routine operations off the Philippine coast around 9 a.m. when the helicopter crashed, the service said.
There were two pilots and two crew members aboard the helicopter, officials say. Their injuries ranged from minor cuts to broken bones.
Details on whether the helicopter or aircraft carrier sustained damage were not provided. The Navy said the ship remains fully mission capable and has resumed flight maneuvers.
The cause of the crash is still under investigation.
This is the first known crash of a Navy helicopter in the Pacific since April last year, when a MH-60 crashed after takeoff from a destroyer near Guam.
This is a developing story. We are working to learn more information and will continue to bring you updates as we get them.