Excerpt:
FBI director Robert Mueller defended the agency's use of informants within US mosques amid complaints that worshippers and clerics were being targeted instead of possible terrorists.
Mr Mueller's comments came days after a Michigan Muslim organisation asked the US Justice Department to investigate complaints that the FBI was asking the faithful to spy on Islamic leaders and worshippers.
Similar alarm followed the disclosure earlier this year that the FBI planted a spy in Southern California mosques.
"We don't investigate places, we investigate individuals," Mr Mueller said during a brief meeting with reporters in Los Angeles.
"To the extent that there may be evidence or other information of criminal wrongdoings, then we will ... undertake those investigations. We will continue to do it."