Neighbours and paramedics tried for half an hour to save a teenager shot in north London late last night, but eventually he was pronounced dead at the scene.
Forensic teams have spent the day at the site of the shooting in Lower Edmonton. Ronke Phillips reports.
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Dozens of women gathered on Westminster Bridge to form a human chain in a show of solidarity with the victims of Wednesday's terror attack.
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.