I just got the news in this morning's email--no details yet, but he had been ill recently, and in hospital around the time Kitty Hayes died a couple of months ago.
(For those of you reading who aren't in the Irish trad scene, Paddy was a fiddler, and Kitty a concertina player. Both were of, as they say, an advanced age, and both were great musicians.)
I would not be at all surprised if Claire Keville does a tribute to Paddy on her radio show either on Clare FM this Tuesday or next. The show begins at 7pm Irish time, and I think it's archived online for a week afterward.