Las Vegas gunman Stephen Paddock fired special “incendiary” bullets at a 43,000-barrel fuel tank in what investigators believe was an attempt to cause an explosion, two law enforcement sources told CNN. Those types of rounds, meant to ignite what they hit, were found inside Paddock’s room at the Mandalay Bay Resort and Casino and near the fuel tank a short distance away on the grounds of McCarran International Airport, the sources said. Authorities have previously disclosed that Paddock fired at the tank and struck it with two rifle rounds, when he opened fire on the crowd below from his 32nd floor hotel room on October 1. The new detail about the ammunition is one of several pieces of information that investigators are attempting to put together to determine Paddock’s specific intent, precisely how he carried out the attack, and whether he intended to survive. Those rounds produce a flame when fired and allow the shooter to follow the bullet’s path for more precise aim, according to the sources, who requested not to be named because they are not authorized to speak publicly about such details.