Seven people wanted by police in connection with a fatal shooting at a caravan park in Somerset have been arrested, police said.
Wilfred Isaacs, 50, died on Friday evening near Ilton, Ilminster, while a man in his twenties was also injured during the double shooting.
Police believe the weapon used, which remains undiscovered, was a shotgun.
John Broadway, 37, is currently being held on suspicion of murder, attempted murder, and firearms offences.
His younger brother Charlie, 23, handed himself in to police on Friday and is being held on suspicion of murder and attempted murder.
Charlie Broadway's wife Donna, 26, was arrested on Saturday evening on suspicion of assisting an offender, having also turned herself into police.
A total of seven people are now in custody in connection with the shootings, including two women besides Broadway.
"We're working round-the-clock to ensure we carry out a thorough and professional investigation into this horrific crime," said Detective Superintendent Andy Bevan.
"We'll continue to leave no stone unturned in our quest to establish the full circumstances".
He added: "We're also continuing to look for the weapon used in this crime, which we believe to be a shotgun.
"If anyone knows where this weapon is they should call us immediately".