Kassim Mohammed, a 32-year-old father, was shot dead in a Sheffield street on Tuesday night, marking the second of three shootings in the city over the past three days. His family has released a moving tribute to a devoted father who had a “caring nature”. A 22-year old man has been arrested on suspicion of murder and remains in custody. Police are investigating whether there is a link between all three shootings. They are seeking witnesses and information for the investigation.