Northern Powergrid and Leeds City Council are said to be investigating the noise. Residents in the Horsforth area of Leeds had first reported hearing a loud, high-pitched buzzing noise on Tuesday evening.
Several neighbours reported the noise in the LS18 postcode area and some spotted Northern Powergrid engineers working in the area.
There was some concern there might be a serious problem, with one worried resident asking the electrical company on Twitter: “Is something going to explode?”
Northern Powergrid has now confirmed there is no risk to the public. In fact, the noise turned out to be nothing more than a loud, persistent house alarm.
A spokesperson said: “We have had engineers investigating this and have identified the cause as a private house alarm.”
However, the issue still existed on Tuesday evening.
Since LeedsLive published this story, a number of residents had reached out to add their frustrations with the constant noise throughout the evening.