A Malaysia Airlines plane was reportedly shot down over Ukraine Thursday. Flight 17 was en route from Amsterdam to Kuala Lumpur when it crashed near the border with Russia. All 298 people aboard were killed. Top defense officials are now telling Fox News they have new evidence as to who could have shot down passenger jet MH17.

New audio released by Ukrainian security service reportedly conveys pro-Russian rebels confessing to downing the commercial airliner.

Are Pro-Russian Separatists Behind Downing of Malaysia Airlines Flight 17?

The audio between two rebels translates in part:

“The minor group has just shot down an airplane.”

“What have you got going on there?”

“Well in short, it’s a 100 percent sure that it’s a civilian plane…it’s [expletive] bad.”

Fox News national security correspondent, Jennifer Griffin, reports that U.S. authorities say there is no reason to doubt the authenticity of the tapes intercepted by Ukrainian intelligent services.

Russian separatist Igor Bezler also tweeted out the following and then immediately deleted the message: “Bird falling. We warned you not to fly in our sky.”

Listen to the new audio tapes above and watch the report below with new video from the scene.

More on the Malaysia Airlines plane crash:

Photos: Malaysia Airlines Flight MH17 Wreckage

Shep on Malaysia Airlines Crash: 'If Putin Is Responsible, the World Will Know'

O'Reilly: Putin Responsible for Flight MH17 Crash, 'Little Will Happen to Him'