UK police have arrested seven people in connection to the terror attack in London in which four people were killed.
The raids were conducted in six addresses in London, Birmingham and other parts of the country in connection with the attack.
The attacker, armed with two large knives, drove into a number of pedestrians on Westminster Bridge, before crashing his car into railings and then running through Parliament gates and stabbing a police officer.
The terrorist was killed after being shot by police. The officer also died of his wounds.
Britain’s most senior counter-terrorism officer, Mark Rowley said police would not be making the identity of the attacker public at this stage.
Rowley said it was still his belief the attacker worked alone and was inspired by ‘international terrorism’, adding that there was no specific information to suggest any further threat to the public.
40 people were injured in the attack.
29 people are being treated in hospital for injuries, seven remain in a critical condition.
A woman from South Australia is among the injured.
The victims killed in the attack have been identified as police officer Keith Palmer, 43 year old Aysha Frade and a man aged in his mid 50s.
There were earlier reports five people were killed, the death toll has now been revised down to four people including the attacker.
A minute’s silence has been held in House of Commons at Westminster to honour those killed.
London mayor Sadiq Khan has paid tribute to PC Palmer who he said died in the course of duty, protecting parliament and protecting London.
‘We mustn’t cower, we mustn’t allow the terrorists to succeed and destroy our way of live, or divide communities,’ said Mr Khan.
‘This isn’t the first time terrorists have killed Londoners. We’ve shown in the past we are resilient and we are going to show that again,’ he said.
Earlier, UK Prime Minister Theresa May hcondemned the ‘sick and depraved’ attack on London.
Speaking in Downing Street, the Prime Minister praised the ‘exceptional bravery’ of police and security services during the attack in Westminster, and also paid tribute to the emergency services as a whole.
She insisted any attempt to defeat the values Parliament stands for was ‘doomed to failure’.
And Mrs May vowed that ‘the voices of hate and evil’ would never be allowed ‘to drive us apart’ and she would ‘never give in to terror’.
Mrs May said the location of the accident was ‘no accident’ and ‘terrorists chose to strike at the heart of our capital’.