Mystery surrounds the wiring of a Massachusetts home with a deadly device that would detonate at the flip of a certain light switch. <br /> <br />An electrician found the sinister set-up while checking over the Milton property that had been recently been put up for sale at 3:45 p.m. on Tuesday, according to the Boston Globe. <br /> <br />A plastic jug filled with accelerant had been connected to a specific switch in the closet of an upstairs bedroom. It was then plastered into the wall. <br /> <br />Anyone who had flicked that button would have sent the house up in flames. <br /> <br />Cops were called and the bomb squad was scrambled to safely deactivate the mechanism. No-one was injured, <br /> <br />Milton Police Chief Richard Wells said the homemade bomb was rigged to first set the home's roof rafters on fire. <br /> <br />Homeowner Lindel Williams said he was "stunned" by the discovery. <br /> <br />He revealed that the former tenants, who had lived there since June 2014, moved out last Sunday, <br /> <br />And he added that they'd reported, just one day before they moved out, that someone had poured concrete into the property's plumbing system. <br /> <br />Wells said investigators were looking at "several persons of interest." People who had access to the home were of particular focus, he added.
