A man spotted outside the window of a Liverpool city centre hotel in the early hours sparked a major response from emergency services.
Police, fire crews and ambulance raced to Chapel Street around 4am after concerns for the safety of a man.
The man was spotted outside the window of the Mercure Atlantic Hotel in the heart of the city's business district.
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Police said the emergency is connected to an earlier "domestic incident" when a woman was found with facial injuries in the city centre.
At around 7am, a 20-year-old man from Poulton, Wirral, was arrested on suspicion of Section 18 wounding and criminal damage and has been taken to a police station for questioning.
Roads were closed and early morning workers had to avoid the Chapel Street and Tithebarn Street as a police cordon blocked the scene and fire crews and ambulances waited on stand by.
North West Ambulance Service confirmed they attended but nobody was taken to hospital.
The roads around the business district have now fully reopened.
A spokesperson for Merseyside Police said: "A man has been arrested on suspicion of assault and criminal damage following a domestic incident in Liverpool City Centre in the early hours of this morning, Thursday 24 June.
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"At around 4am, emergency services were called to the Mercure Atlantic Hotel on Chapel Street to reports of a concern for safety of a man outside a window of the hotel. A woman was found with facial injuries.
"At around 7am, a 20-year-old man from Poulton, Wirral was arrested on suspicion of Section 18 wounding and criminal damage and has been taken to a police station for questioning."
Anyone with information can contact police @MerPolCC with reference 21000440474.
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