Flowers left by a member of the public outside New Scotland Yard

Flowers left by a member of the public outside New Scotland Yard in central London, Britain March 23, 2017. Scotland Yard said that police have made seven arrests in raids carried out over night in Birmingham London and elsewhere in the country after the terror attack in the Westminister Palace grounds and on Westminster Bridge on March 22, 2017 leaving four people dead, including the attacker, and 29 people injured. (Photo: Will Oliver/EPA)