premise: The visiting U.S. Assistant Secretary of State Richard Boucher on Tuesday said the United States did not have any involvement in the attack on a religious school in Pakistan's tribal region.
  "The Pakistani government has said they carried out initiative to deal with serious threats from fighters who were in that location," Boucher told reporters at U.S. embassy.
  "The Pakistani government says it has carried out this action. And it was necessary because militants, terrorists created a training center," he said.
  He supported Pakistan's policy to engage tribal elders to establish peace in the tribal region.
   What did the attack refer to?
hypothesis: carried out initiative