Police hunting the killers of Wolverhampton couple Guiseppe and Caterina Massaro battered their way into the home of an elderly Birmingham man in a bungle over addresses.
Erdington pensioner Patrick Brogan said he was woken by the sound of splintering wood as police smashed through his front door at 6am on Monday.
But, after discovering the 75-year-old looked nothing like the man they were after, officers realised they had raided the wrong house.
Eyewitnesses said police were seen running towards a nearby property minutes later, where West Midlands Police confirmed a 30-year-old man was arrested.
Officers swooped on the properties on Erdington’s Lyndhurst Estate as part of the investigation into the brutal murders of Italian-born Guiseppe Massaro, aged 80, and his wife Caterina, aged 77.
A West Midlands Police spokesman said it was a “genuine mistake” by officers working on a “fast moving investigation” into the horrific double murder in Wolverhampton on Friday.
Mr Brogan, who lives alone, said: “I was asleep when I heard an almighty bang on the door. I was frightened.
“I shouted at them to stop and said I would open the door. But the police came through the door and I was nearly hit on the head.
“They told me to sit down and showed me a photograph of a man. But I didn’t look like him.
“It was very poor of them. There was no need for it. I’ve lived here for seven years and never had any police record or anything like that.”
Workmen were later called to Mr Brogan’s home to fit a temporary metal security door to his home.
A police spokesman said: “A major investigation is ongoing into the deaths of Guiseppe and Caterina Massaro and as part of this officers were seeking to arrest a man in the Erdington area.
"This is a fast-moving investigation and it is important we act swiftly on information and intelligence coming into the incident room.
“Officers who were carrying out the arrest initially entered the wrong address and, when they realised their mistake, the correct premises was entered a couple of minutes later.
“This was a genuine mistake and we have apologised sincerely to the occupant of the address and informed him of the reasons behind our actions. We have arranged to have his property secured.”
West Midlands Police said the 30-year-old man arrested in Erdington was being quizzed along with two other men, aged 21 and 32, who were detained in Wolverhampton.
All three were being held at separate police stations in the region on suspicion of murder.
A forensic post-mortem examination was continuing to determine how the couple died.
They were found dead in the main bedroom of their ransacked Park Village home by granddaughter Lindsey Booth just after 8pm on Friday.
The family issued a statement on Sunday which said: “Words cannot describe the devastation that has struck our family after discovering our beloved grandparents hurt by the hands of someone else.
“We cannot even begin to grasp the evil that took place in their home and how frightened they would have been.”