Experts have confirmed that the debris found on Reunion Island last week was that of Malaysian Airlines flight 370 that went missing last year, Malaysia's prime minister said Wednesday.

"It is with a very heavy heart that I must tell you that an international team of experts has conclusively confirmed that the aircraft debris ... is indeed MH370," Prime Minister Najib Razak told reporters.

>>>RELATED: 3 ominous theories for what happened to MH370

Malaysian Airlines published a press release shortly after the debris was confirmed:

Malaysia Airlines would like to sincerely convey our deepest sorrow to the families and friends of the passengers onboard Flight MH370 on the news that the flaperon found on Reunion Island on 29 July was indeed from Flight MH370. This has been confirmed jointly today by the French Authorities, Bureau d' Enquetes et d' Analyses pour la Securites de I'AviationCivile (BEA), the Malaysian Investigation Team, Technical Representative from PRC and Australian Transportation Safety Bureau (ATSB) in Toulouse, France and subsequently announced by the Prime Minister of Malaysia, Dato' Seri Najib Tun Razak.

Family members of passengers and crew have already been informed and we extend our deepest sympathies to those affected.

This is indeed a major breakthrough for us in resolving the disappearance of MH370. We expect and hope that there would be more objects to be found which would be able to help resolve this mystery.

Moving forward, Malaysia Airlines' priority will continue to provide latest updates and information to the families and will fully cooperate with the relevant authorities on the investigation and recovery of this tragic accident.

The wing fragment washed up on the Indian Ocean island of Reunion and was sent to France, where experts began examining it on Wednesday. Investigators will analyze the metal with high-powered microscopes to probe what caused the plane to go down.

>>Photos: 777 debris found on Indian Ocean island

The debris was discovered last week on the French island of Reunion and was loaded Friday onto a plane bound for France.