Daily Mail: The skinhead former soldier who killed six people and critically wounded three at a Sikh temple yesterday before police shot him dead could have been part of a violent race hate group, sources say.

Witnesses said a tall, bald, white man in his 40s opened fire just before services, entering the kitchen at the Sikh Temple of Wisconsin in suburban Milwaukee at about 10.30am as women prepared a Sunday meal.

It sent worshippers fleeing to escape the barrage - with many hiding in cupboards and texting the outside world begging for help.

He is said to have had a 9/11 tattoo, marking the September 11, 2001 attacks by Islamic militants - and has been described in some quarters as a 'white supremacist'.

 'He had tattoos, I don't know what the exact markings were, or if they represented any of his beliefs or what they stood for,' said Thomas Ahern, of the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives. 

Four people were shot dead inside the sprawling temple. Three more, including the gunman, were killed outside.  The gunman ambushed and shot a police officer who was responding to a 911 call and helping a shooting victim, Oak Creek Police Chief John Edwards said. A second officer shot and killed the gunman.  The wounded officer, a 20-year veteran, was taken to a hospital and is expected to survive. Hospital officials said two other victims, also in critical condition, were being treated.  Authorities did not release the name of the suspect. They said the shooter had used a 9mm semi-automatic pistol, which was recovered at the scene. Officials were tracing origin of the weapon, Ahern said.

ABC News: Though police have not given any details on the identity or motive of the shooter, or released the identities of the victims, sources have told ABC News the shootings are the work of a "white supremacist" or "skinhead."

This evening, the FBI and a bomb squad arrived at a home in Cudahy, Wis., near Oak Creek, and ABC News Milwaukee affiliate WISN reported the action appeared to be related to the temple shootings earlier in the day.

Authorities also were trying to trace a single, semiautomatic handgun recovered at the scene, sources told ABC News.

In addition to the seven confirmed dead, three people -- two adult male civilians and a male police officer -- were in critical condition and were being treated at a local hospital, said officials at the hospital, Froedtert & The Medical College of Wisconsin.

The apparent gunman was shot and killed in an exchange of gunfire with the wounded police officer outside the temple and was one of the seven dead...

Edwards said authorities were treating the event as a domestic terrorism incident and the FBI would be conducting a full investigation.

"The FBI is working closely with the Oak Creek Police Department and other local and federal agencies to investigate today's shooting incident," FBI Milwaukee Special Agent in Charge Teresa Carlson said in a written statement. "This remains an active investigation in its early stages. While the FBI is investigating whether this matter might be an act of domestic terrorism, no motive has been determined at this time. We know our community has been deeply impacted by this incident, and our thoughts are with those affected and particularly with the officer who was wounded in the line of duty to protect others."

SPLC Hatewatch: Alleged Sikh Temple Shooter...identified in media reports as Wade Michael Page, is a former member of a racist skinhead band. The Southern Poverty Law Center has evidence that Page in 2010 was the leader of a skinhead band based in Fayetteville, N.C., called End Apathy.     

In 2000, Page also attempted to purchase goods from the neo-Nazi National Alliance, then America's most important hate group.