http://photorumors.com/2013/03/10/pentax-rumored-to-announce-several-new-dslrs-and-a-new-compact-aps-c-camera/
The source of information is not mentioned, though. But I believe that the PR should have some insider channel for what they said, as before (and that it was proven for times that they were right, although not always). And yes, PR (Photo Rumors)