KUALA LUMPUR--Malaysia declared on Thursday that the disappearance of Malaysia Airlines Flight 370, which went missing last year, was an accident and that all 239 people on board are dead.

The Malaysian statement doesn't affect the search effort, which is being overseen by Australia and handled by private contractors hired by the Australian government.

The search for the Boeing 777 that disappeared on March 8, 2014 has yet to yield the location of the plane, Department of Civil Aviation Director-General Azharuddin Abdul Rahman said in a recorded statement. Mr. Azharuddin said the search for Flight 370 would remain a priority.

"Malaysia is committed to continue all reasonable efforts to bring closure to this unfortunate tragedy, with the continuing cooperation and assistance of the governments of China and Australia," he said.

The flight, which vanished during a routine flight from Kuala Lumpur to Beijing, is believed to have crashed deep in the Indian Ocean, far off the western coast of Australia.

Authorities are still probing the incident but both safety and criminal investigations are limited by the lack of physical evidence, particularly the flight recorders, Mr. Azharuddin said.

"An interim statement detailing the progress of the safety investigation is expected to be released on or around the one year anniversary of the accident," he added.

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