Initially, the attackers attempted to enter the compound at the main checkpoint. When they were denied access by U.S. military personnel, at around 9:43 p.m. local time, they drove a Datsun scout vehicle, another car and the bomb truck, to a parking lot adjacent to building #131. A chain link security fence and a line of small trees separated the car park, used for a local mosque and park, from the housing compound. The perimeter of Building #131 was approximately from the fence line, with a perimeter road between the fence and building which was often used by military personnel for jogging. The first car entered the car park and signaled the others by flashing headlights. The bomb truck and a getaway vehicle followed shortly after. The men parked the truck next to the fence and left in the third vehicle. The bomb exploded three to four minutes later at approximately 10:20 p.m. local time. The blast was so powerful that it was felt away in the Persian Gulf state of Bahrain.