Oscar Pistorius is so paranoid about being poisoned in prison that he is reportedly surviving on tinned food from the tuck shop . The Paralympic star , who was jailed four months ago for killing his girlfriend , has lost so much weight that his prosthetic limbs no longer fit him , according to local media . The 28-year-old South African sprinter is allegedly refusing his daily rations at Kgosi Mampuru prison following death threats by fellow inmates . Jailed : Oscar Pistorius ( centre ) holds the hand of his uncle Arnold as he is taken down to the holding cells after being sentenced to five years in prison for culpable homicide killing at a court in Pretoria . Behind bars : He is said to be refusing his daily rations at Kgosi Mampuru prison ( pictured ) - a sprawling correctional facility in Pretoria , which is dominated by a violent gang culture - following death threats . Instead , he is using his monthly allowance of £9 to buy food at the tuck shop , including tins of ‘ chakalaka ’ - a spicy African vegetable concoction , reported South Africa ’ sYou magazine . News of the fallen track star ’ s poisoning fears and dramatic weight loss follows an improvement in his prisoner status , as exclusively revealed by MailOnline last month . Now a category A prisoner , the ‘ Blade Runner ’ is entitled to the maximum privileges afforded to a convicted inmate , including ‘ contact ’ visits , the freedom to wear jewellery , pursue a hobby and own a radio . His budget at the tuck shop has also increased , from £6 a month to £9 . Pistorius is four months into a five-year sentence for the manslaughter of Reeva Steenkamp , following a lengthy murder trial last year during which his doctor described the pain he suffers as a result of poorly-fitting artificial limbs . Death : Pistorius is four months into a five-year sentence for the manslaughter of Reeva Steenkamp ( left ) . He is pictured ( right ) during the men 's 400m semi-final during the London 2012 games . Crime scene : In October , Pistorius was convicted of culpable homicide over the death of 29-year-old Reeva at his home ( above ) on Valentine 's Day in 2013 . The London 2012 star is being held on the hospital wing of the sprawling correctional facility in Pretoria , which is dominated by a violent gang culture , where he is said to have little contact with other inmates . One of his neighbours is Czech fugitive Radovan Krejcir , who is facing a number of charges including murder , with whom he shares a running machine and exercise bike . In October , Pistorius was convicted of culpable homicide over the death of 29-year-old Reeva at his home on Valentine 's Day in 2013 . The double amputee shot the model four times through a locked toilet door after mistaking her for an intruder . He could be released from jail in August and allowed to serve the remainder of his sentence under house arrest . However , the state has appealed Pistorius ’ s acquittal on a charge of murder . The athlete ’ s own lawyers have challenged the ruling to allow the appeal . The next hearing in the case is next week .
South African sprinter is 'refusing daily rations ' at Kgosi Mampuru prison . The athlete was arrested in Johannesburg on Tuesday and charged with assaulting a police officer during an arrest for allegedly stealing his mobile phone. Using £9 monthly allowance to buy tuck shop food , including 'chakalaka '