London (dpa) – Seven people have been arrested and six addresses raided in connection with the deadly car-and-knife rampage outside the British parliament, police said Thursday.
The assailant acted alone and was inspired by international terrorism, London’s Metropolitan Police Service said.
British Defence Secretary Michael Fallon told BBC Radio 4’s Today programme that the “working assumption is” that the Westminster attack “is linked to Islamic terrorism in some form.”
Four people died in Wednesday’s attack, Assistant Deputy Commissioner Mark Rowley said in revising the casualty figures.
The death toll includes the attacker, who was shot and killed by police at the gates of parliament after fatally stabbing an officer.
Police are not naming the suspect.
Seven of the 29 injured remain in critical condition at hospital, Rowley said.
While extra police have been deployed across Britain, he stressed that there was “no specific information about further threats to the public.”
“Clearly our investigation is ongoing … and is focused on his motivation, his preparation and associates,” Rowley said at a press conference.
The attacker killed police officer Keith Palmer, 48, as well as a woman in her 40s and a man in his 50s.
The death toll, including the attacker, had stood at five late Wednesday. Rowley said it was revised down to four after collecting information from the five hospitals where their injured were taken.
The suspect drove a car into pedestrians on central London’s Westminster Bridge before going after officers with a knife.
Hundreds of lawmakers who were kept inside the parliament building when it was placed on lockdown immediately after the attack. Streets around the remained closed on Thursday.