- Several people feared injured after white van plows into crowd on London Bridge
- Shots fired at scene and victims suffering from knife wounds
- Police also responding to second incident in Borough Market
- Three suspects, possibly armed, wanted by police
Witnesses told Express.co.uk a white van had appeared to purposefullyhit pedestrians on the bridge.
One witness comforting her distraught friend said: "We saw a vehicle mow down like five or six people."
A police officer at the scene urged people to run from the bridge.
She told our reporter at the scene: "This is a terror attack."
Police are searching for three, possibly-armed suspects, Reuters news agency quoted the BBC as saying.
SKY / TWITTER
A vehicle is said to have 'mowed into people' on London Bridge
Met Police said they are also attending a second incident at Borough Market.
Video shows armed police searching Katzenjammers restaurant.
Another Express.co.uk reporter at the scene said: “London Bridge closed at both ends. Sniffer dogs out.
“Witness Ibrahim was walking along the bridge and saw a van ‘mount the kerb and start running over pedestrians’.
“He thinks there were two people involved – driver and one who jumped out and started stabbing people.”
Martin Lucas said on Twitter: “Van drove into people on London Bridge, this is happening now. Really hope all are ok. We are in the middle of it.”
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And Tony Murphy told Sky News: "About half an hour ago there was tremendous gunfire that started.
"I thought at first it was fireworks. That was the first instance and only afterwards the emergency started but the whole incident started with gunfire it was significant gunfire, it went on for 10 minutes."
JOEY MILLAR / EXPRESS
There are also unconfirmed reports of a knife attack following the incident
Police have advised people to keep away from the area. The Shard and the News Building are on lockdown.
A police helicopter is at the scene along with numerous ambulances and police vehicles.
Police at the scene of the incident in London Bridge
Dozens of people were on the bridge at the time of the attack and were being questioned by police.
Many were in tears while at least one appeared to be suffering from shock.
This is a developing story. More to follow…