People across Liverpool reported hearing mysterious loud bangs but were left baffled by the noises.
Shortly after 10pm on Monday night, residents in South Liverpool took to social media to say they had heard a series of bangs coming for many different directions.
Those who heard it described the noises as "bizarre" and said they went on for several minutes but they weren't sure what caused it.
Other people said the bangs sounded like fireworks but they were unable to see any displays of this in the sky over their homes.
On Twitter, people asked their followers if anyone else had heard it and whether there was an explanation.
User Jos even tweeted a video of the noises to help describe them.
* Did you hear the bangs? Tell us what you think they were in the comments
She said: "Why all the sudden fireworks in Liverpool?
"Went on for a good few minutes and a load all at once."
A number of other tweets said they could hear them near Sefton Park, Lodge Lane, Princes Park and Aigburth.
Andrew Ellis said: "We heard them over here, must be something in the Mersey.
"Hopefully not flares signalling something bad."
User @SquashLiverpool also said: "Really loud - can hear it by Prinny Park - what/who is it?"
Matt added: "I was just thinking exactly that, sounds insane."
Neil George Fay said: "Seemed to be towards town around Lodgy way."
It is not yet clear what caused the loud bangs but we have contacted Merseyside Police and Merseyside Fire and Rescue to find out if they have received any reports.,
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