Watch as Pentagon spokesperson holds a briefing after shooting

Pentagon spokesperson John Kirby is holding a briefing after the building was locked down on Tuesday following a shooting at the nearby Transit Center.

The "shooting event" occurred on the bus platform of the Pentagon complex and it has since been confirmed that a police officer died during the incident.

While the exact circumstances are still unclear, it's expected that Pentagon Force Protection Agency Chief Woodrow Kusse will provide further details as he briefs reporters alongside Kirby on Tuesday afternoon.