Two men are being treated in hospital after being found with stab wounds outside a McDonalds restaurant in Regent Street. It happened just before 3:30 Saturday morning.
The men's injuries are not thought to be life threatening and no arrests have been made.
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Two members of the public were injured along with two police officers who were in the unmarked vehicle.
Scotland Yard recorded 1,235 Islamophobic attacks in the last 12 months, compared with 811 in 2015.
Officers say the child, aged two, was targeted in the Lewisham Shopping Centre.