Westminster is currently on lockdown, while Downing Street and Whitehall are closed.
According to witnesses at the scene, an evacuation is underway following the discovery of a suspicious package on Whitehall.
They were called at 12:13pm on Wednesday and remain in the area.
Road closures are in place but are expected to be lifted after police determined the package to not be suspicious.
City of Westminster Police tweeted: “The item has been assessed as not suspicious and road closures are being lifted.”
Follow www.savebritain.org for more updates.