Four people have been stabbed in a series of random attacks in north London.
Police are appealing for witnesses after four victims were attacked from behind without warning while they were alone.
One woman is in hospital after being stabbed in the back at about 7pm last night.
The second victim was attacked four hours later. He is in hospital but his condition is not life threatening.
The third attack happened shortly before 4am this morning when a 23-year-old man was stabbed at Seven Sisters tube station. He is in a critical condition.
The most recent attack took place just before 10am this morning in Brettenham Road in the N18 area. His injuries are potentially life changing.
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