On Thursday morning, the Malaysian prime minister announced that it was “very likely” that piece of debris recently discovered on an island off the coast of Madagascar came from a Boeing 777, the same type of plane as the Malaysian Airlines flight that mysteriously disappeared in March of 2014.

With this discovery, authorities believe they finally have evidence as to where Flight MH370 crashed, if not what happened to the flight.

According to sources speaking to The New York Times, the debris, a nine-by-three-foot flap, reportedly from the wing of a 777, appeared to have been in the water for a year—roughly the same amount of time that the plane had been lost. No other Boeing 777s are reportedly missing, strengthening the case that this was part of the doomed flight.

In a statement, the French aviation safety bureau said it was “not possible at this hour to ascertain whether the part is from a B-777 and/or from MH370.” Australia’s deputy prime minister also urged caution. “It is too early to make that judgment,” Warren Truss said in Sydney. “But clearly we are treating this as a major lead and seeking to get assurance about what has been found and whether it is indeed linked to the disappearance of MH 370.”

The flap washed ashore on the French island of Réunion, roughly 3,000 miles away from where the plane was last located, and was discovered by a group of locals cleaning the beach.

"The location is consistent with the drift analysis provided to the Malaysian investigation team, which showed a route from the southern Indian Ocean to Africa," the prime minister, Najib Razak, said in a statement.

MH370’s inexplicable vanishing prompted a months-long search for its remains in the Indian Ocean (a seemingly futile search), as well as several conspiracy theories on its disappearance, including the belief that nefarious actors may have hijacked the plane and flown it to another country.