UAE and Serbia developing supersonic trainer?

Over the last week or so I keep coming across online articles talking about joint UAE/Serbia development of Supersonic Trainer Aircraft.

“Possibilities for the sale of Serbian weapons and ammunition to the UAE and joint projects for the development and production of rocket systems and supersonic trainer aircraft have been discussed,” Mr Dinkic said in a statement.”

http://www.thenational.ae/news/uae-news/uae-and-serbia-re-engage-after-strained-relations

Does anyone know anything about this?
Or is this just “And pigs will fly”?