She told emergency services that she could see shadows moving under her bathroom door - but it turned out to be her robotic vacuum cleaner.

Armed cops were dispatched to her home in Oregon, USA, and shouted through the door at the unperturbed piece of technology, CNN reports.

The officers, along with their police dog, broke through the door with guns drawn.

However, as sheriff’s deputy Brian Rogers said on Facebook: “We breached the bathroom door and encountered a very thorough vacuuming job.”