Dangerous prisoner Michal Kisier has escaped from Salisbury District Hospital
Michal Kisier, 30, gave his guards at Salisbury District Hospital the slip at 7pm.
He was in the hospital receiving treatment for a head wound.
Kisier is described as white, 5ft 6in tall with blonde hair and of medium build with tattoos on his neck. He was wearing grey tracksuit bottoms and a black t-shirt with blue trainers.
Wiltshire Police said Kisier is believed to have a razor blade in his possession and is considered to be dangerous.
Police are hunting the 30-year-old who is believed to be armed with a razor blade
"The public are advised not to approach him for their own safety. If anyone sees a man matching the description they should call 999 immediately," a force spokeswoman said.
My officers are doing everything they can to find Kisier
Inspector Martyn Sweett
Police officers and dogs are searching the area and a helicopter is also assisting in the search.
Inspector Martyn Sweett said: "My officers are doing everything they can to find Kisier and we will keep the community updated.
The public are advised not to approach him and to call the police to report any sightings
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"We ask that the public are vigilant and call us on 999 with any sightings but it is important that you do not approach him."
Kisier's real name is Michal Kisiel and he sometimes uses the spelling Michael.