British police shot a man dead after a number of people were stabbed at London Bridge on Friday.
Police Commissioner Cressida Dick confirmed that two members of the public have since died in what police are calling a terrorist attack.
(SOUNDBITE) (English) METROPOLITAN POLICE COMMISSIONER CRESSIDA DICK, SAYING: "It is with the heaviest of hearts that I have to inform you that as well as the suspect who was shot dead by police, two of those injured in this attack in the London Bridge area have tragically lost their lives." Three others were injured in the attack.
Police say the suspect was wearing a fake suicide vest.
No motive has yet been established.
Images from the site near the center of the capital show police cars and buses on the bridge, and a truck straddling several lanes.
The attacker went on the rampage just before 2 p.m.
Half a dozen bystanders then tackled the suspect to the ground and grabbed his knife.
A video posted on Twitter showed police dragging one man off the suspect before an officer took careful aim.
Two shots rang out.
The man stopped moving.
London Mayor Sadiq Kahn praised first responders, and the bystanders who intervened.
(SOUNDBITE) (English) MAYOR OF LONDON, SADIQ KHAN SAYING: "I would also like to thank members of the public who risked their own safety this afternoon.
They are the best of us.
Terrorism is cowardly and evil.
We must and we will stand united and resolute in the face of terror." London Bridge was the scene of an attack in June 2017.
Three militants drove a van into pedestrians and then attacked people in the surrounding area, killing eight people.
Britain lowered its threat level to 'substantial' from 'severe' earlier this month.