The FBI says al-Qaeda claimed responsibility, but the sourcing is...uh, dicey.
The source of the claim was apparently an obscure Italian news agency, Adnkronos International (AKI), which said that al Qaeda Afghanistan commander and spokesman Mustafa Abu Al-Yazid had telephoned the agency to make the claim.
"We terminated the most precious American asset which vowed to defeat [the] mujahadeen," AKI quoted Al-Yazid as saying.
http://www.cnn.com/2007/WORLD/meast/12/27/bhutto.dhs.alqaeda/index.html?eref=rss_topstoriesEdit: And I'm sure this isn't going to help matters. From a letter written by Bhutto two months ago:
"Just wanted u to know if it does in addition to the names in my letter to Musharaf of Oct 16nth, I wld hold Musharaf responsible. I have been made to feel insecure by his minions and there is no way what is happening in terms of stopping me from taking private cars or using tinted windows or giving jammers or four police mobiles to cover all sides cld happen without him."
On a side note, I find it immensely depressing that a (former) head of government of a major political and military power wrote "u" for "you."