Updated at 5:37 p.m. ET: A gunman opened fire Sunday morning at a Sikh temple outside of Milwaukee, killing six people and wounding at least three others, including a police officer, before being shot to death, authorities said.
The identity of the shooter was not released and his motive was unknown.
"We’re treating this as a domestic terrorist-type incident," Oak Creek Police Chief John Edwards said at a late afternoon press conference. He did not elaborate.