KUALA LUMPUR (REUTERS) - A piece of suspected plane wreckage found off the coast of southern Thailand three days ago does not belong to a Malaysia Airlines passenger jet that disappeared almost two years ago, the Malaysian transport ministry said on Tuesday (Jan 26).

The debris does not match those of a Boeing 777 and the part numbers found on the debris were not listed on the Malaysia Airlines' parts catalogue manual, the ministry said in a statement following an investigation.

A large piece of curved metal washed ashore in Nakhon Si Thammarat province on Saturday, prompting speculation that it might belong to the missing jet, which was a Boeing 777.

Malaysia Airlines Flight MH370 disappeared with 239 people on board during a flight from Kuala Lumpur to Beijing in March 2014. A piece of the plane washed up on the French island of Reunion in July last year but no further trace has been found.