A large wing part recently found on a Tanzanian island "highly likely" came from missing Malaysia Airlines Flight 370, according to Australia's transport minister.

The piece of debris was found in late June on Pemba Island, in the Indian Ocean near the mainland.

Believed to be part of the outboard wing flap of the missing Boeing 777, it was transported to Australia and analysed by the country's Transport and Safety Bureau.

Minister for Australia's Infrastructure and Transport Darren Chester said the experts will continue to analyse the piece to assess what information can be determined from it.

So far, debris believed to be from the aircraft, which disappeared in March 2014, has also washed up on Reunion Island and in Mozambique, Mauritius and South Africa.

One piece is confirmed to have come from MH370 while officials say four other items are almost certainly from the missing aircraft.