A man who was shot by police after opening fire outside the Pentagon's subway entrance has died of his injuries, according to US media reports.
Officials said the man pulled a gun from his pocket Thursday evening and injured two police officers before he was shot and seriously wounded.
Neither the medical examiner's office nor Pentagon police would immediately confirm the death on Friday.
The shooting occurred during the crowded evening rush-hour outside the busy subway station which is just outside the large Department of Defense building, triggering a temporary security lockdown at the US military headquarters.
The suspect "appeared to be pretty calm" as he approached the entrance, Chief Richard Keevill of the Pentagon Force Protection Agency told reporters.
"As the officers started to ask him for his pass... he drew a weapon from his pocket and started shooting," Keevill said.
"He did not say anything."
Police returned fire and the suspected shooter was critically wounded, Keevill said.
The injuries to the two police officers appeared to be grazing wounds and not life threatening, he said.
Keevill said the suspect was believed to be an American citizen.
Authorities were also reportedly investigating whether there was a second person involved.
