Armed police descend on road in East Sussex after gunshot reports
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First Avenue was closed at about 9.30pm and the National Police Air Service (NPAS) helicopter was called to help with the search for a possible gunman.
"A man was arrested for possession of a firearm in a public place and possession of a firearm with intent to cause fear and alarm," a spokesperson for Sussex Police said.
"He is currently in custody. No one has was harmed."
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Hide AdChief Superintendent Justin Burtenshaw said the incident 'is not terrorist-related'.
He added: "This is a fast moving investigation and I want to reassure the public that there is no threat to the wider community.
"We will continue to have a number of officers in the area while we continue our enquiries and I would like to thank the community for their patience and understanding."