OAK CREEK, Wisconsin
A gunman attacked worshippers on Sunday at a suburban Sikh temple in the midwestern United States, killing at least six people before he was himself shot dead by police.
The police commander at the scene in Oak Creek, near Milwaukee in Wisconsin, said he and federal agents were treating the mass shooting as a suspected act of "domestic terrorism," though the shooter's motive was unclear.
The attack was the second such massacre to shock the United States in under three weeks, and will boost pressure on US President Barack Obama and rival Mitt Romney to address gun control before the November 6 presidential election.
Oak Creek Police Chief John Edwards told reporters that his officers had responded to a 911 call and raced to the temple, where one was "ambushed" and shot multiple times before a colleague took down the gunman.
The suspect died, as did six others shot in and near the temple. Three men, including the wounded officer, were taken to a Milwaukee hospital, where a medic said they were in "critical condition."
Witnesses described a bloody scene of confusion and terror as the gunman strode into the temple and opened fire as people gathered for Sunday services.
Japal Singh, 29, spoke to several fellow parishioners about what happened and said that while people were still confused, some things were now clear.
A man who dropped his father off at the temple, known to Sikhs as a "gurudwara," said he saw the shooter -- described as a white man with a bald head -- kill two people in the parking lot.
"Then he went down inside the temple and then went into the room where the holy scripture is kept and basically shot more people there, multiple people there," said Singh, a combat medic in the US Army reserve.
Witnesses told Singh it was "a horrible place, a lot of blood and basically screams of everybody. Children, women, everybody. It was chaotic inside. People didn't know what was going on."
Police did not confirm the identity of the shooter, although media reports said that the FBI had confirmed his name and had launched a raid at his home.
"We looked at it, the scope of it and what the implications might be. We are treating it as a domestic terrorist incident," Edwards said, adding that there was thought have been only one shooter and that the scene was secure.
Dozens of members of the Sikh community descended on the area after reports of the shooting and were held back behind a police cordon, anxiously scanning their cell phones for news of friends and relatives in the temple.
"Our priest, he's dead. One of my friends' grandfathers, he's dead. It's a very close-knit community. No matter who's hurt, we're all family," Harinder Kaur, a 22-year-old student, told AFP.
Factory worker Navreet Raman, 42, said: "It's terrorizing. It's our worship place. If church is not a safe place, what is? Nothing is safe."
Raman said it had been lucky that the shooting at taken place at 10:30 am (1530 GMT) -- in the morning -- as the temple would later have been crowded with more than 300 people for afternoon services.
Obama said he and First Lady Michelle Obama had been "deeply saddened" to learn of the shooting, and Romney sent his condolences.
"As we mourn this loss which took place at a house of worship, we are reminded how much our country has been enriched by Sikhs, who are a part of our broader American family," Obama said, in a White House statement.
Police tactical units were on the scene, along with officers from multiple law enforcement agencies, including the Federal Bureau of Investigation.
The president of the temple, Satwant Kaleka, was shot and was taken to a hospital, according to The Milwaukee Journal Sentinel, which said the large place of worship had been founded in 1999.
According to religious tradition, Sikh Indians wear turbans to cover their uncut hair and sport long beards. There are thought to be more than 500,000 Sikhs now living in the United States.
In the United States they have often been mistaken for Muslims and have been targeted by anti-Islam activists, particularly after the September 11, 2001 attacks on the United States.
Sapreet Kaur, executive director of the Sikh Coalition, which represents the community in the United States, said police should be allowed to investigate but he suspected a hate crime had taken place.
"There have been multiple hate crime shootings within the Sikh community in recent years and the natural impulse of our community is to unfortunately assume the same in this case," he said.
"Americans died today in a senseless act of violence, and Americans of all faiths should stand in unified support with their Sikh brothers and sisters."
Sunday's shooting also bore some similarities to a March 2005 incident in Brookfield that saw a gunman kill seven worshippers at a church service at a hotel, before turning the gun on himself.
Last month, a gunman burst into a movie theatre showing the new Batman film in Aurora, a suburb of Denver, Colorado, and opened fire, killing 12 people and wounding dozens more.