Worth noting: Two days ago, an actual AN-26 cargo plane was shot down [1]. At the time, Ukraine assumed it had to be a Russian missile, because they did not think the rebels had the ability to shoot anything above a ceiling of about 2.5 kilometers. This seems to be confirming that the rebels are the ones doing the shooting. The intelligence agencies of the world are having a busy day, I'm sure.
[1] http://www.nytimes.com/2014/07/15/world/europe/ukrainian-mil...