Karachi is being discussed as an alternative venue for England's historic first Test in Pakistan, as part of a back-up itinerary the PCB and ECB have been discussing as political unrest continues in Rawalpindi, the original venue for the series opener.
In this itinerary, the dates of the tour remain the same but Karachi hosts both the first and third Tests, with Multan staging the second as in the original schedule. England have not played a Test in Karachi for more than 20 years, since their famous twilight win in the 2000-01 series.
A final decision is expected to be taken in the next 48-72 hours, with the PCB keen to ensure all state and local bodies are on board with the switch.
Khan escaped with injuries to his right leg and is now planning, with his PTI (Pakistan Tehreek-e-Insaaf - Movement for Justice) party, a long march on to the capital, demanding fresh elections.
He was ousted from power in April after a parliamentary vote of no confidence. Though no dates have yet been announced, the march from Lahore is expected to culminate in the capitial towards the last week of November, around the time the England squad land.
More to follow