[Ynet] The bomb detonated on a Jerusalem bus on Monday appears to have been made by a professional; while there is still a dearth of details regarding the bombing, the attacker likely detonated the bomb at the back of the bus to ignite the gas tank.Although details surrounding Monday's bus bombing in Jerusalem that maimed 21 remain unclear, the information that is available points to a small bomb placed at the back of the vehicle, under a seat and above the gas tank.
The placement of the device explains why a relatively small bomb was able to cause such a large and immediate kaboom. The extent of the fire also led to an adjacent bus, as well as a taxi, to go up in flames.