Police ask for CCTV of Tring 'pub fight'
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Officers are carrying out inquiries after reports of an "altercation" involving about 20 people at a pub.
Police were called to the Bell Pub, High Street, Tring, Hertfordshire, at 20:22 GMT on Sunday but said those involved had left the scene when officers arrived.
Police said no crimes had been directly reported to them, but officers had asked for a copy of the pub's CCTV.