Details on these alleged incidents stem in part from the testimony of a handful of whistleblowers who approached the House Committee on Oversight and Government Reform in the days and weeks following the attack on the Benghazi consulate. The incidents are disclosed in a letter to be sent Tuesday to Hillary Clinton from Rep. Darrell Issa, the chairman of the House Committee on Oversight and Government Reform, and Rep. Jason Chaffetz, the chairman of the oversight committee’s subcommittee that deals with national security.

The State Department did not offer comment on the record last night.

The new information disclosed in the letter obtained by The Daily Beast strongly suggests the U.S. consulate in Benghazi and the late Ambassador Chris Stevens were known by U.S. security personnel to be targets for terrorists. Indeed, the terrorists made their threats openly on Facebook…

Rep. Chaffetz told The Daily Beast Monday that the allegations detailed in the letter were based on whistleblowers he described as “people who have firsthand knowledge of the incidents themselves.” Chaffetz declined to provide more details about the whistleblowers other than to say they were U.S. government employees and there were fewer than 10 of them.