OAK CREEK, Wis. — The gunman who killed six people at a Sikh temple in Wisconsin before he was shot to death by police was identified Monday as a 40-year-old Army veteran and former leader of a white supremacist metal band.

First Assistant U.S. Attorney Greg Haanstad in Milwaukee identified the shooter as Wade Michael Page. Page joined the Army in 1992 and was discharged in 1998, according to a defense official who spoke to The Associated Press on condition of anonymity because he was not authorized to release information yet about the suspect.

Officials and witnesses said the gunman walked into the Sikh Temple of Wisconsin in suburban Milwaukee and opened fire as several dozen people prepared for Sunday services. When the shooting ended, seven people lay dead, including Page. Three others were critically wounded in what police called an act of domestic terrorism.