An international team of experts in Australia who examined the debris concluded that both pieces were consistent with panels found on a Malaysia Airlines' Boeing 777 aircraft, Liow said.
"As such, the team has confirmed that both pieces of debris from South Africa and Rodrigues Island are almost certainly from MH370," he said in a statement.
All five pieces have been found in various spots around the Indian Ocean. Last year, a wing part from the plane washed ashore on France's Reunion Island. Then in March, investigators confirmed two pieces of debris found along Mozambique's coast were almost certainly from the aircraft.
The jet, which vanished on March 8, 2014, while flying from Kuala Lumpur to Beijing, is believed to have crashed somewhere in a remote stretch of the southern Indian Ocean about 1,800 kilometers (1,100 miles) off Australia's west coast. Authorities had predicted that any debris from the plane that isn't on the ocean floor would eventually be carried by currents to the east coast of Africa.
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• Malaysia says possible MH370 debris found in South Africa
- AP