As far as I know you cant get it extended in Karachi – you have to go to Islamabad, visit the offices of EP (External Publicity) Wing in Zero Point and in the unlikely event they say yes, then go to the Passport Office in G10 Sector to get an extension stamp. Not to sound too negative but the chances of you getting an extension here at the moment are slim to none – there’s a real issue with foreign journalist/press visas here at the moment.
It used be handled by EP Wing but they had their wings clipped – now everything goes through the Interior Ministry who seem to hate foreign journalists and deny everything in retaliation for all the negative press. New policies mean if you decide to overstay, you will be turned away at the border and refused exit until you obtain an Exit Visa from EP Wing/Interior Ministry – who will make a point of delaying and inconveniencing you as long as possible – it took me a month and $250 in overstay fees just be able to get my last exit visa – and yes I was turned away at the airport and not allowed to pass customs or board my flight until I’d got the exit visa!
For all but a few publications, its not happy times here for foreign journos and visas.
Call Kanwal Iftikhar at Ministry of Information in ISB 0519252314 (please please DONT mention my name) she should be able to confirm the procedure or offer some direction.