Navy Secretary Ray Mabus on Wednesday night ordered three reviews into security clearances in the wake of the Navy Yard shootings, including into whether red flags were missed on gunman Aaron Alexis' clearance.

In the statement, Mabus said there will be a review of "the service record and performance of former Sailor Aaron Alexis. This review is designed to determine the degree to which his conduct on and off duty in the Navy did or did not meet the threshold for the sustainment of his security clearance and fitness for duty."

A second review will be conducted of the "requirements and processes in place that do or do not require contracting companies to inform the Navy in the event those companies choose to review an employee's security clearance.

And a third review, expected following today's wider review ordered by Defense Secretary Chuck Hagel, will be into "the entire process and procedures under which security clearances are granted, validated and renewed in the Navy."

Mabus wants particular attention paid to "the threshold at which conduct issues demand a review of one's clearance privileges."