The Tihar Jail authorities on Saturday told a Delhi court that the injuries sustained by a death-row convict in the Nirbhaya rape case, Vinay Sharma, are "self-inflicted and superficial". "Convict is under control, injuries are self-inflicted and superficial. Radiologist conducted an X-ray and found that convict did not sustain any fracture," Public Prosecutor Irfan Ahmad told the court on Saturday.