They’re saying it was either one of the pilots or someone with flying experience.

Via Politico:

A Malaysian official says investigators there have concluded the missing Malaysia Airlines jet was hijacked and steered off course, the Associated Press reported late Friday.

The official, who spoke on condition of anonymity, said that hijacking by one of the pilots or someone with flying experience was no longer a theory. “It is conclusive.”

The official said no motive has been established, and it remains unknown where the plane was taken.

The conclusion appears to back up the latest speculation picking up throughout the day: Whoever was flying the plane as it vanished may have known what they were doing.

That surmise picked up steam after Reuters, citing undisclosed sources from Kuala Lumpur, reported that military radar suggests that the Boeing 777 took a path between known “navigational waypoints” as it flew westward following its disappearance, “using airline flight corridors normally employed for routes to the Middle East and Europe.”

“This indicates that it was either being flown by the pilots or someone with knowledge of those waypoints, the sources said,” according to Reuters. It also quoted a “senior Malaysian police official” as saying that “we are looking at sabotage, with hijack still on the cards.”

But a later report in The New York Times points to a more erratic and possibly tragic fate for the plane. The Times said radar signals captured by the Malaysian military indicate that the jet made dramatic swings in direction and altitude — including at one point soaring to 45,000 feet, higher than the Boeing 777’s approved limit.