Another assasination in Beirut

The BBC reports that Lebanese cabinet minister Pierre Gemayal has been shot and killed on the streets of Beirut. The killing of Gemayal, a Christian with an impressive pedigree (his uncle Bashir was assasinated during the civil war) is bound to stoke tensions. Motivations?  Those bound to ascribe this to Hezbollah or Syria will be quick to point out that his death means that a quorum in the cabinet won't be possible, neccessitating the establishment of a new one, an ongoing Hezbollah demand.