Earlier this month, he found three more possible pieces of the Boeing 777 on an 11-mile beach on the Madagascan island of Nosy Boraha. During his time there, he also recovered items including a camera case, luggage and other bags, the sole of a shoe, a prayer cap and a cellphone case.
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"There's nothing that ties any of these objects to the plane or its passengers other than they were found on the same beach as the other [suspected] aircraft debris," he told NBC News on Monday.
A spokesman for the Australian government's Joint Agency Coordination Centre, which is coordinating the search, said it was aware of the possible find and Malaysian authorities would be investigating.
"Obviously this has only come to light in the past 24 hours but the Malaysian government handles that side of things and they will make arrangements to make sure it's looked at properly," the spokesman said.