SINGAPORE (AP) - The U.S. Navy ordered a broad investigation Monday into the performance and readiness of the Pacific-based 7th Fleet after the USS John S. McCain collided with an oil tanker in Southeast Asian waters, leaving 10 U.S. sailors missing and others injured.
It was the second major collision in the past few months involving the Navy's 7th Fleet. Seven sailors died in June when the USS Fitzgerald and a container ship collided in waters off Japan.
Vessels and aircraft from the U.S., Indonesia, Singapore and Malaysia were searching for the missing sailors. Four other sailors were evacuated by a Singaporean navy helicopter to a hospital in the city-state for treatment of non-life-threatening injuries, the Navy said. A fifth was taken to the hospital by ambulance after the destroyer arrived in Singapore under its own power, the Maritime and Port Authority of Singapore said.
"It is the second such incident in a very short period of time - inside of three months - and very similar as well," Navy Adm. John Richardson, the chief of naval operations, told reporters at the Pentagon. "It is the last of a series of incidents in the Pacific fleet in particular and that gives great cause for concern that there is something out there we are not getting at."
Richardson ordered a pause in operations for the next couple of days to allow fleet commanders to get together with leaders, sailors and command officials and identify any immediate steps needed to ensure safety.
A broader U.S. Navy review will look at the 7th Fleet's performance, including personnel, navigation capabilities, maintenance, equipment, surface warfare training, munitions, certifications and how sailors move through their careers. Richardson said the review will be conducted with the help of the Navy's office of the inspector general, the safety center and private companies that make equipment used by sailors.
There was no immediate explanation for the collision. Singapore, at the southernmost tip of the Malay Peninsula, is one of the world's busiest ports and a U.S. ally, with its naval base regularly visited by American warships.
Richardson was asked whether the collision was intentional on either side or was the result of cyber sabotage. He said there was no indication the collision was intentional and said cyber issues would be explored just as they were during the probe of the USS Fitzgerald collision. Later, Richardson tweeted there were no indications of cyber intrusion or sabotage, but that the review will consider all possibilities.
The McCain had been heading to Singapore on a routine port visit after conducting a sensitive freedom-of-navigation operation last week by sailing near one of China's man-made islands in the South China Sea. The collision east of Singapore between the 1505-foot destroyer guided missile destroyer and the 600-foot Alnic MC ripped a gaping hole in the destroyer's hull.
The Navy's 7th Fleet said "significant damage" to the McCain's hull resulted in the flooding of adjacent compartments including crew berths, machinery and communications rooms. A damage control response prevented further flooding, it said.