Police check vehicles on Waterloo Bridge in London
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Met arrests in Big Wing crackdown across London

27 February 2013 Last updated at 15:35 GMT

Raids involving thousands of police officers have taken place across London leading to the arrest of suspected drugs dealers and thieves.

The operation, called Big Wing, took place across all 32 boroughs with officers from firearms, air support and mounted branch all at work.

By midday on Wednesday, 189 people had been arrested on suspicion of various crimes including theft, drugs possession, burglary and robbery.

Ch Supt Simon Letchford said: "Gang violence, drugs, and knife crime are serious, high-harm crimes that can sadly have a devastating and lasting effect on local communities."