Westminster Police have cordoned off an area in Whitehall after a suspicious package was reported near Parliament.
Scotland Yard said they received reports of the package at 3.01pm.
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Dozens of police closed junctions while a Metropolitan Police helicopter flew overhead.
The bomb squad arrived at the scene a short time later and unloaded their tracked remote control robot to investigate the package.
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Separately, a person could be seen climbing up scaffolding near the base of the Big Ben tower at parliament.
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