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Metropolitan Police Service
The Metropolitan Police is being investigated over "the level of force" used to detain a teenage girl in Newham who was hit with a baton and Tasered.
The Independent Office for Police Conduct (IOPC) became aware of the incident which happened on 8 May at about 19:20 on Roman Road.
IOPC's Sal Naseem said: "Having reviewed the complaint and viewed body worn video footage of the incident we decided that this matter requires an independent investigation.
"It is important for everyone involved that we understand the circumstances surrounding this incident."
The Met Police said it made the referral to the IOPC.
Thousands of serving and retired police officers, police staff, their families and friends will gather at Westminster Abbey today for a special service of thanksgiving to mark 100 years of women police officers in the Met.
This event echoes the service of 100 years ago held at the Abbey to honour the fallen police officers of the First World War.
That service, on 17 May 1919, was the first occasion where female Met officers wore their uniforms in public.
One hundred years ago today, on 17 May 1919, Met Police women appeared in public for the first time at a special service at Westminster Abbey held to honour the losses of officers in the first world war. A century on, in 2019, I am delighted that Westminster Abbey will once again host a unique service and welcome on this occasion not just a handful, but thousands of Met police women, who will represent even more of their colleagues."