It is a fact that a majority of the attacks against the Shia minority are being launched by the Lashkare Jhangvi as well as Al Quaida and Baloch tribes. According to some reports there is a strong presence of RAW agents in the Balochistan Province as well as other agents from around the world but neither Irani nor Saudi agents have ever been named (as far as I know). There is a huge possibility that Saudi agencies may be funding parts of the terrorist organisations but I do not feel that Iran would be a strong part of this judging by the lack of retaliation by the Shia minority.