They were called to give specialist support after the man presented to Gloucestershire Royal Hospital A&E with the 57mm shell in his behind, reports The Sun.
The unidentified man reportedly claimed the inert bomb was his own and that he had “slipped and fallen” on it.
A source told the newspaper: “The guy said he found the shell when he was having a clear out of his stuff.
"He said he put it on the floor then he slipped and fell on it — and it went up his a**e.”
Police said the shell had been removed before they attended the scene, reports the paper.
Bomb squad officials were also apparently called.
A second source reportedly said: “It was basically an inert lump of metal, so there was no risk to life — at least not to anyone else’s.”
Hospital officials also said that all “relevant safety protocols” were followed and that there was no risk to any other patients, visitors or staff at the hospital.
The man is now said to be expected to make a full recovery from the unfortunate incident.
