The shooting incident took place outside the building on the Metro Bus platform, which is a major entrance to the Pentagon used by thousands of personnel every day entering and leaving the building.
A Californian man, who harboured ill feelings towards the US administration and the country's armed forces, on Friday coolly walked up to the Pentagon's screening area and shot two police officers before being fatally wounded, leading to security lockdown of the US military headquarters for hours.
In anticipation of a verdict to be delivered by the International Tribunal of the Permanent Court of Arbitration in The Hague on Tuesday, China has orchestrated a worldwide campaign to defuse its findings.