London Bridge has been cordoned off as armed police respond to reports that a van has hit a number of pedestrians.
A number of witnesses reported seeing a white van mount the pavement and drive into people.
Transport for London said the bridge has been closed in both directions due to a “major police incident”.
Bus routes were being diverted and the neighbouring Southwark Bridge has also been shut, it added.
Social media is going crazy as spectators either working late or passing by pull out their phones to capture the scene. Many have taken to Twitter in shock and disbelief at what they have just seen, stating it’s scary resemblance to what happened on Westminster Bridge.
A BBC reporter who was on the bridge at the time of the incident, said the van was driven by a man and was “probably travelling at about 50 miles an hour”.
“He swerved right round me and then hit about five or six people. He hit about two people in front of me and then three behind,” Ms Jones told the BBC News Channel.
“I’d say there are about four severely injured people. They all have paramedics assisting them at the moment.”
She said the van, which was travelling from the direction of central London, headed towards the south side of the river.
Ms Jones later reported seeing a man being arrested by police. She said he was handcuffed and had his shirt off.
She said a French woman was among the injured and who told her she did not know where the two people who had been with her were.
Just a day before the Manchester tribute concert, we can only hope and pray that these victims survive and Britain can have something to celebrate soon.
Messages of hope, love and resilience circulate social media as the United Kingdom strives for unity more than ever before.