Mysterious ‘booms’ have been ringing out in the middle of the night in an American town, keeping people awake, and leaving police baffled.
It’s the latest in a series of reports of mysterious noises seemingly coming from nowhere.
The sound, in Denver Colorado, has been ringing out for weeks, with locals capturing it on CCTV cameras.
Wheat Ridge Police Department posted on Facebook, saying, ‘Have you heard loud booms in Wheat Ridge lately?
‘There have been posts on social media about loud booms or “explosions” being heard in the City, bordering Wadsworth east to Sheridan, and from W. 26th to W. 38th Ave.
‘It appears these incidents occur frequently on Saturday and Sunday, although some have occurred on other days of the week, between 9 p.m. and 7 a.m.’
Similar sounds have been heard around the world, from Colorado to Yorkshire, with 64 reported last year, the Daily Mail reports.
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Experts have suggested a wide range of explanations from sonic booms to meteorites to controlled detonations of military weapons.
Last year, residents in Alabama heard a strange ‘boom’ from the sky,
Birmingham National Weather Service tweeted: ‘Loud boom heard: we do not see anything indicating large fire/smoke on radar or satellite; nothing on USGS indicating an earthquake.’
Bill Cooke, head of NASA’s Meteroid Environment Office at the Marshall Space Flight Center in Huntsville, said, ‘No one can figure out the cause.’
Previously, residents have reported similar sounds in areas such as Abergavenny in Wales and Queensland, Australia.