Police called out to a 999 call about an unexplained object in the night sky solved the mystery straight away for their operator - "it's the Moon, over."
But the emergency call meant the officers were sent out to a house in the valleys area of south Wales.
They were told a "bright stationary object" was spotted above the unnamed caller's home.
A recording of the call has been released as part of a police campaign asking people to use 999 appropriately.
The Control Room conversation, which took place in May, was recorded - and below is a transcript:
Control Room: "South Wales Police, what's your emergency?"
Caller: "It's not really. I just need to inform you that across the mountain there's a bright stationary object."
Control room: "Right."
Caller: "If you've got a couple of minutes perhaps you could find out what it is? It's been there at least half an hour and it's still there."
Control: "It's been there for half an hour. Right. Is it actually on the mountain or in the sky?"
Caller: "It's in the air."
Control: "I will send someone up there now to check it out."
Caller: "OK."
The mystery was soon solved, as the exchange between control and an officer at the scene, makes clear.
Control: "Alpha Zulu 20, this object in the sky, did anyone have a look at it?"
Officer: "Yes, it's the moon. Over."
BBC NEWS | Wales | Police say UFO was just the Moon
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