A 65-year-old American man who rigged his home with traps to keep out intruders has been killed by the device.
Ronald Cyr called police in the town of Van Buren in the state of Maine to say he had been shot.
Police found a door had been designed to fire a handgun should anyone attempt to enter. Cyr was taken to hospital but died of his injuries.
Police in Van Buren, which borders the Canadian province of New Brunswick, said they responded to a 911 call in the early evening of Thanksgiving, last Thursday, from a man who said he had been shot.
“Following an extensive investigation that lasted into the early morning… it was determined that Mr Cyr had been shot as the result of the unintentional discharge of one of his homemade devices,” the police department said in a Facebook post.
“Regretfully, Mr Cyr succumbed to the injuries he sustained from the gunshot.”
It is not known how he managed to set off the device.
The police also found other possible devices and called in help from the Maine State Police Bomb Squad.
It is not uncommon for home-owners to install such traps, but this is illegal.
In February, a team of real estate investors walking through a home they had bought in Philadelphia discovered that a staircase had been rigged with string which, if tripped, would have triggered a swinging knife.
In September last year, a man in Illinois was killed when he opened a neighbour’s shed that had been rigged to fire a shotgun. William Wasmund, 48, was found guilty this September of first-degree murder and aggravated battery.