A man has been arrested after a woman’s body was found inside a unit in Sydney’s south-west this morning.

Police were called to an apartment on Knox Street in Belmore about 7.50am after a call was made concerning the woman’s welfare.

When they arrived, a woman believed to be aged in her 30s was found dead.

Police investigating after woman's body found at unit in Sydney's south west.
A man has been arrested after a woman’s body was found inside a unit in Sydney’s southwest this morning. (SMH/Perry Duffin)

She has not yet been formally identified.

Police later arrested a 35-year-old man at a home in Denham Court

He was taken to Campbeltown Police Station and is said to be assisting police with their inquiries.