A part number on a piece of an aircraft wing found in the Indian Ocean confirms that the part is from a Boeing 777, a Malaysian transport official said Friday, according to reports.

“From the part number, it is confirmed that it is from a Boeing 777 aircraft. This information is from MAS (Malaysia Airlines). They have informed me,” Deputy Transport Minister Abdul Aziz Kaprawi told AFP.

The 6-foot-long wing section, identified as a flaperon, was taken to Toulouse, France, where it was expected to arrive Saturday morning, officials said.

It could take at least a week to determine if the part, which was found on the tiny island of Reunion off Africa’s east coast, is from missing Malaysia Airlines Flight 370, officials said Thursday.

Flight 370 is the only Boeing 777 known to be missing, which leads experts to believe the flaperon came from the doomed aircraft.

The part will be studied by French crash investigators in a hangar where wreckage from an Air France airliner that crashed in 2009 was also analyzed.

Martin Dolan, head of the Australian agency coordinating the underwater search for Flight 370, told CNN on Friday that he is “increasingly confident, but not yet certain” that the wreckage is from the plane.

“The only 777 aircraft that we’re aware of in the Indian Ocean that could have led to this part floating is MH370,” he told CNN

Boeing investigators also are confident that the flaperon is from a 777, a source close to the investigation told the news outlet.

Boeing investigators are basing their opinion on photo analysis and a stenciled number on the piece that corresponds to a 777 component. A component number is not the same as a part number, which is usually much longer.

A flaperon, which helps the pilot control the plane, is lightweight and has air pockets, making it buoyant.

The shredded suitcase that also washed ashore Thursday on the island is part of the probe, Reunion Island police officials told CNN.

But Australian Deputy Prime Minister Warren Truss said officials were less sure that “the bag has anything to do with MH370” than they are about the flaperon, CNN reported.

Meanwhile, a volcano erupted Friday on Reunion, Reuters reported.

The government of the island, officially a part of France east of Madagascar, has banned access to the Piton de la Fournaise volcano, including by helicopter, after the eruption.