The blast is sad. Anyhow brother, what GEO came up with, how it was known? Did those who are responsible of blast rang police to tell what happened, about their plan and change of plan because Musharraf did not turned up … or … was police themselves responsible of that blast and thus know about the plans? 
I think that government should start investigation with this news as cue and focus on personals in police who came up with this conclusion.