A man was detained by armed police following an incident on the Kennet and Avon Canal.
Officers were deployed to Semington Swing Bridge at around 7pm this evening after what Wiltshire 999s understands was a boat rage incident where some form of gun was shown.
The National Police Air Service helicopter circled overhead as the armed officers attended the scene off Pound Lane. A man was detained as they became aggressive towards them but was later released.
It transpired that the weapon shown by a woman during the dispute between two separate narrowboat occupants was an air pistol. She was subsequently arrested.
A spokesperson for Wiltshire Police said: “Officers were called to an incident on the Kennet and Avon Canal at approximately 6.45pm last night following a report that a woman had been seen in possession of a suspected firearm on a boat.
“A woman in her 70s was arrested on suspicion of possession of an imitation firearm in a public place and taken to Melksham custody for questioning.
“She has since been released under investigation while enquiries continue.”
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