MILWAUKEE - Authorities say a 40-year-old Army veteran was the gunman who killed six people inside a Sikh temple in Wisconsin.

First Assistant U.S. Attorney Greg Haanstad in Milwaukee identified him 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.

During a press conference Monday morning the FBI said there is no reason to believe anyone other than Page was involved in the mass shooting.

They also added that the 9mm handgun used in the mass shooting was purchased legally, and that police had not had prvious contact with Page.

A civil rights group says Page was once the leader of a white supremacist band. The Southern Poverty Law Center describes Wade Page as a "frustrated neo-Nazi."

The SPLC says Page told a white supremacist website in an interview in 2010 that he had been part of the white-power music scene since 2000 when he left his native Colorado and started the band, End Apathy, in 2005.

A USA Today report says Heidi Beirich, director of the center's intelligence project, insists there is "no question" Page was an ardent follower and believer in the white supremacist movement. She said her center had evidence that he attended "hate events" around the country.

"He was involved in the scene," she said.

Page enlisted in the military in April 1992 and was given a less-than-honorable discharge in October 1998. CBS reports that Page served at Fort Bliss, Texas, in the psychological operations unit in 1994, and was last stationed at Fort Bragg, N.C., attached to the psychological operations there.

The Associated Press reports that such specialists are responsible for the analysis, development and distribution of intelligence used for influencing foreign populations.

The New York Post reports that Page was a Hawk missile system repair specialist before moving on to psychological operations.

The details of his discharge were not immediately clear, although CNN says a military source cites "patterns of misconduct."

Wade was killed outside the temple in a shootout with police officers after the rampage. CBS, citing unnamed sources, says evidence suggests race or ethnicity may have played a role in the violence, but no links to extremist groups have been confirmed.

Officials and witnesses say Page walked into the Sikh Temple of Wisconsin in suburban Milwaukee around 10:30 a.m. Sunday and opened fire. When it was over, seven people lay dead, including Page, who was shot to death by police. Three others were critically wounded. Police are calling it an act of domestic terrorism.

The victims of the rampage are described as adults between the age of 39 and 84-years-old. One was a 41-year-old woman and the rest are men. Three others remain hospitalized, including an Oak Creek police officer who was shot 8 or 9 times after Page ambushed him.

In other developments, the Milwaukee County Medical Examiner's Office has received the bodies of the seven people who died in a shooting at a suburban Sikh temple.

Medical Examiner spokeswoman Karen Domagalski said autopsies will be conducted Monday morning.

The dead include six people who were shot by the alleged gunman and the shooter who police say was shot and killed in an exchange of gunfire with an officer. The FBI has taken the lead on the investigation into what authorities call an act of domestic terrorism.

Meanwhile, residents of a suburban Milwaukee neighborhood evacuated as federal authorities searched a duplex have been allowed to return to their homes.

The suburb of Cudahy is about 6 miles from the Sikh temple where six people were shot and killed by a gunman who was then fatally shot by an officer Sunday.

Federal agents and local authorities converged on the Cudahy neighborhood and focused on the duplex. Bureau of Alcohol, Tobacco, Firearms and Explosives agent Tom Ahern said a warrant was being served at the home of the gunman, but he did not specifically identify the duplex.

A Cudahy police dispatcher, who did not want to be identified, said residents began returning to their homes around midnight.

The Minnesota Sikh community is among those left reeling in the wake of the shooting.

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