Five men and three women have been arrested in connection with the murder of a sub-postmaster's son during an armed robbery.
The suspects were detained early ton Tuesday morning over the fatal shooting of Craig Hodson-Walker, who was gunned down as he tried to fend off masked robbers at his family's post office in Fairfield, Worcestershire.
West Mercia Constabulary said four people were arrested on suspicion of murder and attempted murder while the other four were being questioned on suspicion of assisting an offender.
The suspects were arrested from six addresses across south Birmingham in an operation involving more than 100 police officers.
Mr Hodson-Walker, 29, was shot in the chest on Friday morning as he tried to protect his parents, Ken and Judy, both 56, at Fairfield Post Office and Stores.
His father was shot in the leg during the attack and remains in a stable condition in hospital.
Speaking at the scene, Superintendent Adrian Pass said: "Those arrested are currently being held at police stations across the West Mercia and West Midlands force areas. We would like to express their thanks to the public and the media for their information and co-operation so far during this ongoing operation."
The Post Office has 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.
Miss Bundy, from Ross-on-Wye, Herefordshire, has described her fiance as her "soulmate and best friend".
