Police have surrounded a house where a pensioner - thought to have a gun - is in a stand-off with officers.
Armed officers are involved in the bid to solve the siege, which started after police were called to a house in Harbour Road, Pagham, West Sussex, at around 4.10pm on Sunday.
A 72-year-old man was reported to be armed and using threatening behaviour.
Sussex Police said a woman known to the man was also in the house, but had left and was safe and well.
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There are no reported injuries but the man remained in the house alone and officers were negotiating with him.
A police cordon was set up around the house and the road was closed.