LAHORE-The PP caravans from across the country left for Larkana on Monday to attend the central ceremony being held at Garhikhuda Bakhsh on the night between April 3 and 4 to observe 33rd death anniversary of party founder Z.A Bhutto.  Convoys of party workers on buses and trains would reach Larkana, the ancestral abode of Bhuttos, on Tuesday evening (today) as part of their annual ritual.