Today’s DomPost carries a story (not on Stuff but reprinted from the Sydney Morning Herald) showing Russian Air Force officers claiming that a Ukrainian fighter was close to Malaysian MF17. It was described as a “SU-25 fighter jet, which is typically equipped with air-to-air missiles.”
I’m a plane-spotter from a way back, with a particular interest in Russian aircraft. The SU-25 is a ground attack aircraft, not an interceptor. Its unloaded ceiling is 23,000 feet. well below the height at which MF 17 was flying. Its secondary armament is short-range small warhead air-to-air missiles. Interestingly the Wikipedia specification for the SU-25 ceiling was apparently recently edited from a Russian IP to back up the story.
The Russian generals were specific – they named and blamed a SU-25. The Financial Times sets out the reasons why the Russian scenario is not credible.