RJR News / Eight arrests have been made in raids in London, Birmingham and elsewhere following an attack in Westminster that left four persons dead yesterday. Mark Rowley, Acting Deputy Commissioner and head of counter terrorism at the Metropolitan Police, said hundreds of detectives worked through the night, carrying out searches. He said the attacker was inspired by international and Islamist-related terrorism, but gave no further details. Those killed are Police Officer Keith Palmer, Aysha Frade who worked at a London college, a man in his 50s and the attacker. Seven of the injured are still in hospital in a critical condition. A further 29 were treated and released. The attacker drove a car along a pavement on Westminster Bridge knocking down pedestrians and creating panic. He then ran towards Parliament where he stabbed PC Palmer who was unarmed. Armed police then shot him. Prime Minister Theresa May said the attack was sick and depraved and struck at values of liberty, democracy and freedom of speech.