Media captionWhat happened at London Bridge?
Passers-by who tackled a man wielding a knife on London Bridge have been praised as "amazing heroes".
The man had stabbed two people to death and wounded three others in a terror-related attack.
Footage on social media shows the knifeman being held down by members of the public before firearms officers intervene and shoot him dead.
One man who helped restrain the attacker said they had been trying to dislodge a knife from this hand.
The suspect, Usman Khan, 28, was a convicted terrorist who had been released on licence.
The Queen praised the emergency services and "the brave individuals who put their own lives at risk to selflessly help and protect others".
Members of the public also expressed their admiration for those involved.
George Robarts tweeted about the "bravery" of one man, filmed walking away from the attacker holding a knife.
British Transport Police (BTP) said the man seen holding the knife was a plain-clothes officer.
BTP Chief Constable Paul Crowther, said: "The courageous actions he took when faced with the horrors of this attack are remarkable.
"He, as well as other members of the public, should be extremely proud of what they did to stop this man on London Bridge."
Amy Coop, who was inside Fishmongers' Hall where the attack began, tweeted her praise of a man who went to confront the attacker.
Report
The man who grabbed the tusk was a Polish chef, identified only as Lucasz.
He was joined by another man who used a fire extinguisher and let it off in the face of the attacker to try to keep him at bay.
Fishermans' chief executive Toby Williamson said both men thought a bomb might be involved.
He confirmed Lukasz was among the injured, but said he was "doing all right".
"They are two of the most humble people you would know. They would have used their fists if they had to," he said.
He praised all his staff adding they were "determined to level the odds against a madman".
Image caption Toby Williamson, chief executiv