NEW YORK (AP) — The killing of six worshippers at a Sikh temple in suburban Milwaukee brought fresh worries Sunday to the half million U.S. followers of a faith whose congregants have worried about their safety since the Sept. 11, 2001, attacks, when some began targeting adherents of a peaceful religion that stresses the equality of people.

While police have not identified the gunman, who was killed by police, or described a possible motive for the Wisconsin shootings, several leaders of Sikh organizations nationwide say the killings have brought to the surface fears that have lingered since 9/11 when some ignorant about their beliefs began mistaking them for potential terrorists.