The United States embassy in London has entered lockdown due to a ‘security alert’.
Armed police and fire services were photographed outside of the building in Nine Elms, London.
A witness cited a ‘loud bang’ which he claims police confirmed was ‘genuine’.
Nearby roads have been closed to traffic and pedestrians while police investigate the cause.
One witness wrote on X: ‘Lots of armed police, fire trucks, etc…’
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