The FBI says the motive behind the shootings at a Sikh temple that left six worshippers dead remains unknown but authorities still haven't identified anyone other than the gunman as being responsible.
FBI Special Agent in Charge Teresa Carlson also told a Wednesday news conference that investigators determined gunman Wade Michael Page died of a self-inflicted gunshot wound to the head after he was shot by police. Authorities previously said an officer had fired the fatal shot.
Carlson says federal officials had not opened any investigation into Page before Sunday's shooting. She says investigators are interviewing dozens of people who have known Page as they work to determine for a possible motive.
Meanwhile, three people injured in the shooting remain hospitalized in critical condition. They include Police Lt. Brian Murphy. He was one of the first responding officers and was shot 8 or 9 times as he was tending to a shooting victim outside the temple.
And - President Barack Obama has called Indian Prime Minister Manmohan Singh to express his condolences over the shooting deaths of six Sikh worshippers at a Wisconsin temple.
White House press secretary Jay Carney says Obama called the prime minister on Wednesday. Several of the victims in Wisconsin were from India.
The gunman, identified by officials as Wade Michael Page, opened fire Sunday at a Sikh Temple in the Milwaukee suburb of Oak Creek, killing six worshippers before he was wounded by police and then shot himself in the head.
Carney says the two leaders discussed their "shared commitment to tolerance and religious freedom" and the president reiterated his appreciation of the contributions that Sikhs make in the U.S.
Singh is India's first prime minister from the Sikh faith. (AP)
Sikh Temple representatives are holding a candlelight vigil Wednesday at the Sikh Temple at 1380 Selmi Way in Reno. It will start at 7pm.