HRK
THINK TANK: CONSULTANT
Yes it was known to may that US and KSA were pressuring Zia regime for create disturbance for Iran.
This was one of the reasons Iraq was also against Pakistan as Pakistan after Islamic revolution in 1979 remained not only passive towards Iran but also was not supporting Iraq during the Iran-Iraq war.
As far as stingers missiles issue. It was also reported by many that Iran managed to get stinger by Shia Mujahideen groups of Hazara Tribes of Afghanistan (read about this decades back therefore forget the name of the group) which used to get supply from Pakistan through Iran route against USSR.
That group itself was not complicit in this; actually Iran under the law enforcement operations raided the supply convey deep inside their territory.
Pakistan after this incident faced lot of pressure from USA to recover the missiles which Pakistan somehow mange to recover most of stinger missiles (not all) by pursuing Irani Regime at heights level.







