US police kill gunman who targeted court US authorities have shot and killed a man who they say opened fire on police headquarters in Austin. THE man also targeted a US courthouse and the Mexican Consulate, Assistant Police Chief Raul Munguia said on Friday. Officers were searching the suspect's Austin-area residents for possible explosives. Police did not immediately confirm whether the man, whose name was not immediately released, had explosives. The gunfire was reported early on Friday morning, Munguia said, and some bullets hit police headquarters. Both the consulate and courthouse were closed at the time of the gunfire. "An officer outside the building saw the suspect, fired at the suspect, the suspect went down," Munguia said. Officers then saw what appeared to be an improvised explosive device in his vehicle, and that "the suspect was wearing some type of vest," Munguia said. Police said they were trying to determine a motive for the gunfire, which shut down a stretch of Interstate 35 for hours.