OAK CREEK, Wis. (AP) — Federal officials say the gun used to kill six people at a Sikh temple in Wisconsin was bought legally and they have no reason to believe anyone but the slain gunman was involved in the shooting.

FBI Special Agent in Charge Teresa Carlson said Monday that officials aren't aware of more threats to the Sikh Temple of Wisconsin in the Milwaukee suburb of Oak Creek.

She says the FBI is investigating the Sunday shooting as a possible act of domestic terrorism but doesn't know a motive at this time. The Southern Poverty Law Center civil rights group has identified gunman Wade Michael Page as a known white supremacist.

ATF Special Agent in Charge Bernard Zapor says Page used a legally purchased 9mm handgun and multiple ammunition magazines in the shooting.