Police have arrested a third suspected after a man in his thirties was found stabbed in the back in Poplar on Friday night. The victim later died in hospital. Yesterday two men were arrested. All three men remain in police custody. A post mortem will be carried out later today.
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The 24-year-old was unarmed and the incident is not being treated as terror-related.
Some platforms have been taken out of service with disruption expected to continue until the end of the day.
The Met Office has extended its weather warnings for snow and ice to cover vast swathes of the country, including London and the South East.