Eight people are being held over an armed robbery in which sub-postmaster's son Craig Hodson-Walker was shot dead. The 29-year-old was shot in the chest on Friday morning as he tried to fend off four masked raiders at Fairfield Post Office and Stores in Fairfield, Worcestershire. A spokesman for West Mercia Police said: "Four were arrested on suspicion of murder and attempted murder. Four other people were arrested on suspicion of assisting an offender." The early morning arrests were made at six addresses in south Birmingham and involved officers from West Mercia and West Midlands Police. The suspects, three women and five men, are being held at police stations across the West Mercia and West Midlands force areas. Craig Hodson-Walker lived and worked at the village Post Office alongside his parents, Ken and Judy, both 56. His father was shot in the leg during the attack, when a group of men armed with a handgun and sledgehammer burst into the store. They fled the scene in a silver Volkswagen Golf, which was stolen on New Year's Eve and found abandoned in a lane near the store shortly after the shooting. The Post Office offered a £50,000 reward for information leading to the arrest and conviction of Mr Hodson-Walker's killers. Mr Hodson-Walker had recently become engaged to teaching assistant Lisa Bundy, who described her fiance as her "soulmate and best friend".