Detectives hunting the killer of a Co Londonderry pensioner have arrested a 39-year-old man.
The suspect was detained in the greater Belfast area by officers from the Police Service of Northern Ireland (PSNI) serious crime branch.
Bertie Acheson, 72, died after a confrontation with an intruder at his home in Glenmore Gardens, Coleraine.
A PSNI spokesman said officers were searching a property in Antrim.
Mr Acheson and his wife Sheila were asleep in bed when they were woken by the sound of breaking glass at about 1.30am on April 30.
The pensioner got out of bed to see what was happening and went into the kitchen, where he was confronted by a male intruder who demanded money.
The intruder made his way into the bedroom where he threatened Mrs Acheson, who is 70 and suffers from arthritis, before taking her red purse and escaping with £375.
Mrs Acheson raised the alarm but by the time ambulance personnel and police arrived her husband was dead. It is understood he suffered a heart attack.
The Crimestoppers charity has offered £10,000 for information which leads to the conviction of the culprit.
Police said they have carried out extensive inquiries. Detectives have visited 240 houses and taken 200 statements from members of the public. A substantial amount of material has been downloaded from 80 CCTV systems and is being studied.