Scientists say a meteor was the cause of a bright flash of light reported by people across Scotland and northern England.
Police Scotland said the force began receiving calls about 6.55pm on Monday, with people reporting a loud bang, a sudden blue, green or white light or a fireball in the sky.
Several drivers caught the sudden flash and streak of light on their dashboard cameras. Driving instructor Bill Addison said it looked like "a bright, electric blue spark”.
"I thought it was a plane coming down at first, but it was moving too fast," he was quoted by the AP as saying.
The UK weather forecasting service, Met Office, said on Tuesday the incident wasn't weather-related and the UK defence ministry wouldn't comment on whether the flash was linked to military activity in the area.
Steve Owens, manager of the Glasgow Science Centre planetarium, said the likely culprit was a chunk of space rock about the ‘size of a tennis ball or maybe even a watermelon’ that was burning up in the atmosphere.