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.
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.