After more than seven hours a siege in Sydney’s south-west has ended peacefully.

Emergency crews were called to Devlin Street in Ashcroft just before midnight following reports a man was armed with a gun.

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Tactical operations police surrounded the property and negotiators were brought in after reports of a man inside the unit making threats.

A perimeter was set up around the area and residents were told to stay inside their homes.

Negotiators spent most of the night speaking to the 47-year-old, who surrendered shortly after 7:00am.

Officers seized a number of items from the property, which will now be examined.