Both Westminster and Waterloo bridges have been shut due to the discovery of a World War Two bomb in the River Thames.
Westminster Police said in a tweet: "Please bear with us as we deal with dredged up suspected WWII ordnance."
Waterloo bridge has been closed going northbound and Westminster bridge was shut in both directions. Part of Victoria embankment has also been cordoned off as police investigate the situation.
The road closures have been impacting bus routes through the capital and Westminster tube station has been closed.
They've closed Waterloo Bridge entirely, not letting people or buses through! pic.twitter.com/GgcT8HVVqf— 楊靜安 Jingan Young (@jinganyoung) January 19, 2017
Police closing Waterloo bridge?! pic.twitter.com/i95Qul0Zd4— 楊靜安 Jingan Young (@jinganyoung) January 19, 2017