Story highlights Malaysian officials confirm metal paneling found on Friday not from missing passenger jet

No sign of the plane since wreckage was found on Reunion Island last year

(CNN) Debris found in Thailand last week is not from missing Malaysia Airlines Flight 370, officials said Tuesday.

A large piece of curved metal paneling was found on Friday by a fisherman on the coast of Nakhon Si Thammarat province, leading many to speculate that it might be further evidence of the passenger jet that disappeared on March 8, 2014 with 239 people on board.

"From seeing the pictures in local news, this is definitely not a piece from military aircraft, but it looks like a section from a big commercial aircraft in my personal opinion," Royal Thai air force spokesman Pongsak Semachai told CNN on Sunday

However, after inspecting the debris in conjunction with Thai officials, Malaysian investigators said that the metal does not belong to a B777 9M-MRO aircraft and so could not be connected to MH370.

No repeat of Reunion

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