A 'suspicious package' was found at the MI5 headquarters, triggering a lockdown as specialist officers scramble to the scene.
The roads outside the security services headquarters have been shut to traffic as emergency services responded.
Staff were advised to leave the building and officers were reportedly called just after 11:30am this morning after a member of staff raised the alarm over the suspect package.
But less than an hour later, the Metropolitan Police told the Mirror that the device had been deemed non-suspicious and the emergency response was stood down.
The roads have since reopened after the scare as the A3212 Millbank between Vauxhall Bridge and Lambeth Bridge was shut.
A spokesperson for the Met Police said: "At 11.25am on Thursday, November 10, police were called to Millbank, SW1 after concerns were raised about a suspicious item. Road closures were put in place while the item was assessed.
"At 12.23pm the item was found to be non-suspicious and the incident was stood down."
