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TOKYO — Eight people aboard a Navy plane that crashed Wednesday in the Pacific were recovered in good condition and a search continues for three other missing personnel, the Navy said.

The Navy said in a tweet that the eight were brought aboard the USS Ronald Reagan. Their C-2 “Greyhound” transport aircraft crashed while on its way to the carrier about 150 kilometers (90 miles) northwest of Okinotorishima, a Japanese atoll.

The Navy said the ship was operating in the Philippine Sea, which is east of the Philippines, when the crash occurred at 2:45 p.m. Japan time. The names of the crew and passengers are being withheld pending next of kin notification.

The cause of the crash was not immediately clear, the Navy said.

The plane was taking part in an ongoing joint U.S.-Japan naval exercise in waters surrounding Okinawa from Nov. 16-26. The Navy called it the “premier training event” between the two navies, designed to increase defensive readiness and interoperability in air and sea operations.

The 7th Fleet has had two fatal accidents in Asian waters this year, leaving 17 sailors dead and prompting the removal of eight top Navy officers from their posts, including the 7th Fleet commander.

The USS John S. McCain and an oil tanker collided near Singapore in August, leaving 10 U.S. sailors dead. Seven sailors died in June when the USS Fitzgerald and a container ship collided off Japan.

The Navy has concluded that the collisions were avoidable and resulted from widespread failures by the crews and commanders, who didn’t quickly recognize and respond to unfolding emergencies. A Navy report recommended numerous changes to address the problems, ranging from improved training to increasing sleep and stress management for sailors.