Yes I saw the Dawn news and after reading this and reading their sited article of BBC it says there's a possibility that US used "this route", but proof or they also saying that it happened.
A BBC report explored the possibility of the CIA conducting the drone strike without any support from Afghanistan’s neighbours.
Even in the original BBC article it simply said
Zawahiri strike was likely "much more difficult" than previous killings to execute, given the absence of any US government presence or assets nearby.
Ye Dawn ki news tu muje paid lag rahi hia for face saving by twisting the facts and diverting attention from the possibility Pakistani air space usage.
Title he dekh lain "Drone that hit Ayman al Zawahiri flew from Kyrgyzstan: reports"