O.J. Simpson has been reprimanded by Nevada jail officials after being caught stealing cookies from the prison cafeteria.

According to the DailyMail.com, guards recently observed the 66-year-old NFL Hall of Famer stuffing something under his prison uniform as he walked back to his cell after lunch. When they quizzed and searched him, suspecting he had smuggled a cell phone or some other banned item into the facility, they allegedly found about a dozen oatmeal cookies.

'O.J. just stood there with a goofy grin on his face as the guard kept digging inside his shirt and throwing the cookies on the floor,' The Mail reported.

The cookies were seized and the website reports guards could have written Simpson up for disciplinary action, but elected to let him off with just a warning.

The Mail reports doctors have previously warned Simpson, who is looking noticeably tubby, to ease up on the fat and sugar-laden foods and start exercising more because he suffers severe diabetes.

Simpson is serving a 33-year sentence for armed robbery and was infamously acquitted in the stabbing deaths of his ex-wife, Nicole Brown, and her friend, Ron Goldman, more than a decade ago.