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Extra police are on the streets as police investigate if two stabbings on Friday are linked
A 17 year old boy died in Brixton on Friday - just hours after another was seriously hurt in West Norwood.
There have been 7 stabbings in the area in the last two weeks.
It comes as four people are questioned after an 18 year old was stabbed in Pimlico on saturday night.
He's critically ill after it happened on Gloucester Road just after 9 o'clock.