A man wanted over the murder of Peter Stuart and the disappearance of his wife Sylvia has been arrested in Luxembourg.
Ali Qazimaj was wanted in connection with the death of Peter Stuart, 75, and his missing 69-year-old wife.
The 42-year-old suspect was arrested after a member of staff at a hostel in Luxembourg alerted authorities, having identified him from photographs on the internet.
The couple, from Weybread, Suffolk, were reported missing on 3 June. Mr Stuart's body was found later that day in woodland near his home. A post-mortem confirmed he had died of multiple stab wounds.
His wife has been missing since 29 May and police are treating her disappearance as a murder inquiry.
Police concede there is "very little hope" of finding her alive and have widened the search area around where Mr Stuart's body was found.
Speaking at Suffolk Police headquarters, Detective Chief Superintendent Simon Parkes said: "We have expanded the search significantly away from the home in the Weybread area.
"We are concentrating our efforts south from Weybread and down to the Tilbury area and will continue to do so.
"We searched all round the area where Peter was found and we have broadened that search out significantly and we have been looking at areas that have been associated with Ali Qazimaj and we have been responding to any information that we have had during the course of the investigation."
The couple were filmed on CCTV walking into Goodies farm shop in Pulham Market at about 10.20am on 29 May.
On 6 June officers issued an appeal to trace Qazimaj, from Tilbury, Essex, in connection with the murder and disappearance. He caught a ferry alone from Dover to Calais two days earlier.
Qazimaj, a Kosovan immigrant who also goes by the name of Marco Costa, was living in Tilbury, Essex, and working as a forklift truck driver in Purfleet.
On 5 June a 61-year-old man from Leicester was arrested in connection with the murder and bailed.
A Suffolk Police spokesman said: "Detectives from Suffolk are now working with the National Crime Agency, the Crown Prosecution Service and authorities in Luxembourg to seek Ali Qazimaj's extradition following the granting of a European Arrest Warrant relating to the murder of Peter and Sylvia Stuart."