This is a breaking news story and is being constantly updated by our reporters as the breaking news story develops
Green Park station has been forced to close after a casualty on the tracks as police swarm in to deal with the incident.
Several lines are being affected severe delays this morning (April 20) with some stations closed to the public due to a major police incident.
According to reports, no trains are running at all between Waterloo and Finchley on the Jubilee Line due to a casualty on the tracks at Green Park.
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