According to the eye-witnesses, the attackers looked like foreigners!
http://www.thenews.com.pk/top_story_detail.asp?Id=25420
and just a couple of days back 202 "urdu speaking" personnel of blackwater arrived in Islamabad
and a couple of weeks back 4 heavily armed American nationals disguised as afghans were caught in F-8/3
http://ejang.jang.com.pk/10-28-2009/pic.asp?picname=1424.gif
does that ring any bells?