Following the September 11 attacks in 2001, Mazar-i-Sharif was the first Afghan city to fall to the U.S.-backed Northern Alliance (United Front). The Taliban's defeat in Mazar quickly turned into a rout from the rest of the north and west of Afghanistan. After the Battle of Mazar-i-Sharif in November 2001, the city was officially captured by forces of the Northern Alliance. They were joined by the United States Special Operations Forces and supported by U.S. Air Force aircraft. As many as 3,000 Taliban fighters who surrendered were reportedly massacred by the Northern Alliance after the battle, and reports also place U.S. ground troops at the scene of the massacre. The Irish documentary "" investigated these allegations. Filmmaker Doran claims that mass graves of thousands of victims were found by United Nations investigators. The Bush administration reportedly blocked investigations into the incident.