Mexican soldiers killed an American citizen after shots were fired from her car as it approached an army inspection post near the U.S-Mexican border, a Defense Ministry spokesman said. The spokesman said Patricia Kane Fagan, whose hometown was not specified, and her companion, an unidentified Swiss citizen, failed early Thursday to heed orders to stop at the post in the town of Agua Prieta, just over the Arizona border. Shots from the car were heard, he said, and soldiers returned fire as it passed at high speed. Fagan died on arrival at a local hospital and her companion escaped shortly afterward. A .45 caliber pistol, marijuana and several bottles of liquor were allegedly found in the car, the spokesman said.