New York -- TIME magazine correspondent Alex Perry filed an eyewitness report late Sunday of 800 Taliban prisoners in armed rebellion at a Northern Alliance fort near Mazar- I-Sharif. Perry saw 12 Americans and British soldiers fighting with the Northern Alliance against the rebelling prisoners who were grabbing weapons from an armory. The Americans were wearing Air Force uniforms. One of two Americans trapped inside the fort, according to Perry, is dead. "The mission by the Americans and Northern Alliance was to kill every single one of them now."