Investigators are examining plane debris for a possible link to Malaysia Airlines Flight MH370, which vanished in March 2014.

A piece of a plane’s wing washed up on Reunion Island, a remote island off the coast of Africa, which is about 3,000 miles away from the suspected crash site of the missing Boeing 777.

The man who found the debris sent a photo to a French aviation expert, who then contacted his colleagues. Some aviation experts believe that the debris is a piece of a Boeing 777, but others disagree.

MH370 was en route from Kuala Lumbur to Beijing on March 8, 2014, when it vanished less than an hour into the flight. There were 227 passengers and 12 crew members aboard the flight. reported:

A massive search effort that to date has cost more than $100 million has so far proved fruitless. The Australian Transport Safety Bureau is leading the effort.

“Our work will continue to be thorough and methodical, so sometimes weekly progress may seem slow,” the ATSB posted to its MH370 search website early Wednesday, an update seemingly unrelated to the Reunion find. “Please be assured that work is continuing and is aimed at finding MH370 as quickly as possible.”

While the cause of MH370’s disappearance has never been diagnosed, and foul play has not been proved, some suspicion has fallen on the 53-year-old pilot of the plane. After MH370 turned off its transponder, investigators found that the plane appeared to execute evasive maneuvers that would suggest a skilled pilot was in control. Capt. Zaharie Ahmad Shah, who had extensive experience in the cockpit, also had a flight simulator in his home. Additionally, Shah was reported to be having relationship issues.

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