Man charged with partner's murder after Sydney mum's body found

A man has been charged with murdering his partner after the mother-of-two's body was found inside an apartment in Sydney's west.

Paul Sultana, 32, was arrested in the early hours of this morning following the discovery of Dayna Isaac's body inside her Penrith unit yesterday afternoon.

The pair were long-time friends but recently started dating, with concerns raised about her welfare when she hadn't picked up her two young children from daycare.

Mother-of-two Dayna Isaac was found dead in a Penrith unit.

Sultana's mum then allegedly found Isaac's body after she walked into the apartment when the 28-year-old didn't come to the door.

A neighbour had called the police earlier yesterday afternoon after allegedly hearing a loud argument.

But when officers arrived at the Penrith unit, no one answered and so they left.

The neighbour told police they had seen a man leaving the apartment not long after the alleged dispute.

Paul Sultana has been arrested after the discovery of a woman's body in Penrith.

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Isaac's car was found burnt out in bushland at Castlereagh shortly after the mother-of-two's body was found.

Police allege Sultana dumped the car two suburbs away after leaving her unit.

Officers tracked the 32-year-old to his home in Cranebrook and called for back up including the heavily armed tactical operations unit who negotiated with Sultana for an hour around 3am this morning before taking him into custody.

Specialist police were on scene at his home today, sifting through the house for evidence.