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PM: Terror threat raised to critical. Video, 00:02:06PM: Terror threat raised to critical

Tube blast is terror incident, say police

Treating trauma with tea and kindness

Marco Pierre White Jr sorry for Tube tweet

'I thought my life was over after Tube blast'

Trump: 'I'm calling the PM right now' Video, 00:00:41Trump: 'I'm calling the PM right now'

PM: Trump speculation 'not helpful' Video, 00:00:23PM: Trump speculation 'not helpful'

PM: 'Together, we will defeat terrorism' Video, 00:02:26PM: 'Together, we will defeat terrorism'

The passengers caught in the chaos

Passengers describe panic and 'stampede'

What powers do police have to deal with terrorism?

'Hundreds of detectives investigating blast' Video, 00:00:52'Hundreds of detectives investigating blast'

'We ran for our lives... it was a human crush' Video, 00:00:44'We ran for our lives... it was a human crush'

'There was a fireball above my head' Video, 00:00:48'There was a fireball above my head'

Footage shows burning bag on Tube. Video, 00:00:18Footage shows burning bag on Tube

Witness describes 'smell of burning' Video, 00:00:56Witness describes 'smell of burning'

'Passengers said there was a wall of flame' Video, 00:01:09'Passengers said there was a wall of flame'