Britain races to track down a jihadist network suspected of orchestrating the Manchester concert attack, as a row escalates between London and Washington over leaked material from the probe.

Police name 22-year-old Salman Abedi as the man suspected of carrying out the deadliest terror attack to hit the UK in 12 years.

Ariana Grande returns to the United States, one day after a suicide bomber killed 22 people at the singer's concert in Manchester, England, as questions lingered over whether she would continue her European tour.