The centre of Chichester was closed off last night (Thursday, 23) while police dealt with a man who was threatening to harm himself.
Officers said they were called to North Street at around 9.40pm to a report of concern for a man who had a knife.
Armed officers and specialist negotiators attended the scene and engaged with the man.
Police said there was no danger to the general public.
The incident was finished by 1.20am, when a 45-year-old man from Chichester was arrested on suspicion of affray and possession of a knife in a public place.
He was checked by health professionals and taken into custody, according to officers.
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