(CNN) It's been nearly one year since 298 people were killed after a commercial passenger plane broke up over the Ukraine.

U.S. officials concluded Malaysia Airlines flight MH17 was struck by a missile and shot out of the sky. A final report from investigators has yet to be released but CNN has learned new details from the draft investigative report for the July 17, 2014 incident.

Dutch accident investigators say that evidence points to pro-Russian rebels as being responsible for shooting down MH-17, according to a source who has seen the report.

According to the source, the report says it was a Buk missile -- a Russian surface-to-air missile -- that was used, launched from a village in Russian rebel controlled territory.

The Malaysian Airlines flight went down in the Donetsk area of Ukraine. According to two sources with knowledge of the investigation, a draft of an investigative report authored by the Dutch Safety Board, the lead agency in the investigation, has been distributed for review to numerous agencies around the world including the National Transportation Safety Board, Federal Aviation Administration and Boeing.

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