A day after it received hoax mailings containing a white powder, the Mormon church blamed opponents of California's gay marriage ban for recent "attacks" while an allied group condemned "acts of domestic terrorism against our supporters." Investigators have not publicly cited any evidence that the mailings were linked to the Mormon church's support of the measure, and a gay rights group in Utah denied that gay protesters were involved. The letters were sent to the Salt Lake City headquarters of the church, where powder spilled on a mail clerk's hand, and to a temple in Los Angeles. Both packages tested nontoxic, the FBI said Friday. The two temples were sites of recent protests against the church's support for a California ballot initiative that superseded a court decision allowing gay marriage. The Mormon church, whose official name is the Church of Jesus Christ of Latter-day Saints, said it is stepping up security.