Police are urging people in the city to be cautious of cold callers.

On Sunday, December 3 officers received a report of two men going door to door trying to sell items including cloths and scissors on Hughenden Road.

A police spokesman said: "A common theme with these types of incidents is that someone will knock at your door saying they have recently been released from prison or in rehabilitation and offer to sell you household items.

"We advise you to close and lock your back door before answering the front door.

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"If you do not recognise the person, speak through the closed and locked door.

"If they are selling something or offering to do any work on your house or garden, tell them you are not interested and ask them to leave.

"If they persist tell them you will call the police and call us on 999.

"If you have any doubt – keep them out."

Police added they never advise buying goods from - or having work done - by someone who calls at their home unannounced or approaches them in the street..

"Often such traders don't provide full names, trading addresses or contact telephone numbers, resulting in it being virtually impossible to trace them if there are any problems with the work or goods," the spokesman explained.

Anyone feeling threatened by a cold caller should call 999 immediately.

Anyone with information about suspected rogue traders should contact police on 101 or Crimestoppers anonymously on 0800 555 111.