West Yorkshire Police are keen to speak to this man in connection with the incident during which a 19 year old woman was attacked in a yard at the rear of The Vine pub on The Headrow in the early hours of Friday morning.
Her attacker was described as black, 5ft 8, aged in his late twenties with short hair. He was wearing a black hooded top.
The victim is being supported by specially trained officers.
Police are urging anyone who knows Mr Nasanga’s whereabouts to contact the Homicide and Major Enquiry Team immediately on 0845 6060606 or Crimestoppers, anonymously, on 0800 555 111.