Australian officials made the announcement Thursday following the completion of the examination of the two pieces.
"The analysis has concluded the debris is almost certainly from MH370," said Australian Minister for Infrastructure and Transport Darren Chester.
MH370 disappeared more than two years ago en route from Kuala Lumpur to Beijing with 239 people aboard.
The pieces of debris were found separately by a U.S. lawyer and a South African teen in March and sent to Malaysia for examination.
A Malaysian investigation team found that both pieces of debris were consistent with panels from a Malaysia Airlines Boeing 777 aircraft, Chester said.
At least one other piece, discovered on the western Indian Ocean island of Reunion in July 2015, has been confirmed to have come from the missing plane.
The findings were echoed by Malaysian Minister of Transport Liow Tiong Lai.
"The dimensions, materials and construction of both parts conform to the specifications of a Boeing 777 aircraft," a statement from the minister said.
It also notes that the paint and stenciling on both parts match those used by Malaysia Airlines.
"As such, both parts are consistent with panels from a MAS Boeing 777 aircraft, and almost certainly are from MH370."
Daily News