Firefighters have been visiting homes in Carlisle to spread awareness of the dangers associated with carbon monoxide.
They say that although people are becoming more aware of the dangers, not everyone is buying the detectors.
Carbon monoxide detectors can be bought from most major supermarkets and online, and start from around £10.
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The young female, believed to be a Staffy cross Border collie, was spotted wandering in the Mirehouse area of Whitehaven.
Cumbria Police say many of the knives were kitchen or trade knives, but there were also some "antique and dangerous weapons".