Police swooped on the capital's financial district during today's evening rush-hour after two suspicious packages were found near Bank of England.
City of London Police said the packages were sent to the building in Bank, central London, this afternoon.
Officers shut roads and diverted commuters for around one hour while they investigated.
Transport for London warned of delays after cordons were erected.
Police cars could be seen in clips from the scene and shared on Twitter.
"Our officers are currently dealing with reports of two suspicious packages sent to the Bank of England. There is currently a 100m cordon around the building. This is affecting Lothbury, Bartholomew Lane and Princes’ Street. Threadneedle Street remains open," City of London Police tweeted.
But the force later assured the public the area was safe.
It added: "The two packages have been declared safe and the cordons have been lifted. Thank you for your patience."
Limerick suspicious package 'linked to IRA letter bombs sent to UK'
It comes weeks after three "improvised explosive devices" were found in London, including one near Heathrow Airport, one at Waterloo Station, and another at London City Airport.
Anti-terror police investigated these discoveries, which were treated as linked.
Police in Ireland confirmed they are assisting Scotland Yard.
One package burst into flames at Heathrow Airport's Compass Centre.
Another suspect device was found by British Transport Police at a postal room in Waterloo Station.
