A member of the US Air Force is in a critical condition after the incident in Washington on Sunday afternoon.| www.bbc.com
A security guard who attempted to intervene was also injured in the incident and taken to hospital.| www.bbc.com
All the latest content about Gaza from the BBC.| www.bbc.com
All the latest content about Washington DC from the BBC.| www.bbc.com
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Follow the latest news on the Israel Gaza war. Get live updates, maps, verified video reports and expert analysis from BBC journalists on the ground.| www.bbc.com