Sydney woman punched, yacht torched

A Sydney woman has been assaulted and a luxury yacht set alight outside her home during an attempted extortion earlier this year.

Police say the 48-year-old woman was first threatened by two men on July 11 when they came to her home on Hurstville and demanded money, before police were called.

A week later a $150,000 yacht parked out front of the Warwick Street home was set on fire and completely destroyed.

Then on July 23 a man attended the home and again demanded money from the woman, before punching her in the face.

Police on Friday released images of a man seen nearby at the time of the fire and assault, as well as CCTV images of a 2018-model white Mercedes sedan with a dark sunroof.

The man has been described as aged in his mid-20s, with a dark beard and tattoos on his neck and both hands.

Anyone with information about the attacks has been urged to contact police.