Call for Navy security review
US politicians are calling for a review into how the suspected gunman in Monday's rampage at the Washington Navy Yard received and maintained a security clearance, despite a history of violent episodes.
Navy shooter 'hated his Navy commander'
Aaron Alexis, the 34-year-old man responsible for killing 12 people at a Navy base in Washington yesterday, was a heavy drinker with a grudge against the Navy, The Times reports.
Mr Alexis was also a recent convert to Buddhism, and attended a temple in Fort Worth.
Ty Thairintr, who attended temple with him, said he was upset with the Navy because "he thought he never got a promotion because of the colour of his skin. He hated his commander."
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Security clearance questions over Washington gunman
Despite having serious mental health problems and previous incidents with firearms, Aaron Alexis held security clearance for the Navy base.
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FBI probes fatal shooting at Washington Navy shipyard
At least 13 people, including the suspected gunman, have been killed in a shooting at a Navy base in Washington DC.