A doctors’ surgery has issued a warning to its patients after a blade from a Stanley knife was found attached to a door handle, seemingly put there with the malicious intent of hurting somebody.

A sign has been put on the door to the Poplars Surgery on Magpie Crescent in Stevenage which reads: “Beware all patients. Please check the door handle is free of any hazards before using.

“We have had a report of a Stanley blade being put into the handle to catch fingers.”

One patient said: “Why anyone would do this is beyond me. Be careful.”

Another said: “What is wrong with people? Please make people aware.”

Nationally, there have been incidents of razor blades being positioned in toilet roll dispensers in public lavatories and, in perhaps the worst case, a two-year-old was injured after vandals glued razor blades to equipment in a public playground in the United States in 2014.