Police were finally able to enter James Holmes's booby-trapped apartment and found over 30 homemade grenades and 10 gallons of gasoline, which officials believe were intended to explode and harm at least part of the apartment building as soon as Holmes's door was opened. "Imagine that fireball … you would have an explosion that would knock down the wall of [nearby] apartments. That flame would have consumed the entire third floor" of the apartment complex, the official said. "By the time a fire truck would have arrived," the building would have been engulfed in flames. Meanwhile, at least three were arrested for Dark Knight-related threats.