Britain’s most senior counter-terrorism officer, Mark Rowley has said the British police have arrested seven people after an attacker killed three people and injured about 40 before being shot dead.
Rowley on Thursday said four people were already dead including the attacker and 29 people are being treated in hospital.
He added that seven them were in a critical condition.
Rowley said police had searched addresses in London, Birmingham and other parts of the country in their investigation.
“It is still our belief … that this attacker acted alone and was inspired by international terrorism.
“At this stage we have no specific information about further threats to the public,” Rowley said.
The attacker had sped across Westminster Bridge in a car, ramming pedestrians along the way.
He then ran towards parliament and stabbed the policeman before he was shot.
The victims were a policeman who was stabbed and two members of the public, a woman in her mid-40s and a man in his mid-50s.