London's Metropolitan Police have made two further "significant" arrests in connection with the attacks on Westminster Bridge and Parliament Wednesday that left five people dead and 50 people injured.
In a news conference Friday, Acting Deputy Commissioner Mark Rowley appealed to the public that if anyone knew the attacker, identified Thursday as Khalid Masood, his associates or recent movements, they should contact the police.
The new arrests were made Thursday night in the West Midlands and north-west England. Nine people remain in custody and 2,700 pieces of evidence have been seized.
The casualty numbers from the attacks were also revised with now more than 50 people injured, two in a critical condition. The death toll from the attacks rose to five overnight, with 75-year-old Leslie Rhodes from south-west London dying from his injuries.