Complex sentence: Both the Pakistani pilots were killed in the action one of them was Squadron Leader Sarfaraz Rafiqui who had shot down two Vampires on 1 September while the other was Flight Lieutenant Yunus Ahmed.
Split into simpler sentences: Both the Pakistani pilots were killed in the action. One of them was Squadron Leader Sarfaraz Rafiqui who had shot down two Vampires on 1 September while the other was Flight Lieutenant Yunus Ahmed.