mogadishu thousands somalis pray mogadishu friday symbolic funeral 300 people kill country deadly truck bomb truck detonate next fuel tanker saturday create huge fireball incinerate multi-story build around half dead burn beyond recognition say authorities government conduct mass burials soon blast keep muslim practice inter dead quickly possible religious leader abdi hayi say mourners decide conduct symbolic funeral six days possible give many victims proper send-off prayers mosque since see many body come conduct funeral spot blast say bomb attack deadly since islamist militant group al shabaab begin insurgency 2007. al shabaab claim responsibility al qaeda-linked organization increasingly use truck bomb somalia mire conflict since 1991 clan warlords overthrow dictator turn one poor countries africa rely foreign donors support institutions basic service battle-scarred coastal city edge bomb central road city empty quickly locals suspect minivan load vegetables carry bomb police check van shopkeepers residents flee scene close shop run away say shopkeeper abdullahi omar much fear still shock ... persist mind thousands somalis gather mourn bomb victims