Here's what you need to know this morning.

Election 50-50, says poll

NSW's Liberal-National Coalition Government today announced free mobile dental checks and basic dental care for primary school children in certain parts of the state.

Health Minister Brad Hazzard said 35 new mobile clinics would visit schools in western Sydney, the Mid North Coast and the Central Coast. The policy will cost about $70 million.

If you're struggling to keep up with who's promised what so far, we have been keeping a record.

Meanwhile, a YouGov/Galaxy poll published in The Daily Telegraph today suggests a hung parliament is likely when people head to the polls for the election this Saturday.

It revealed the major parties remain deadlocked at 50-50 on a two-party preferred basis — 1,016 people were surveyed around the state.

This is what it had the primary vote at:

Party Per cent Coalition 41 Labor 38 Greens 9 Other 12

Four separate polls have now shown the Coalition and Labor locked at 50-50 on a two-party preferred basis.

The sample was taken before a video of Labor leader Michael Daley making comments about "foreigners" taking jobs emerged.

A tweet was posed from former long-time SBS newsreader Lee Lin Chin took a playful swipe at Mr Daley over the comments, made in September, in which he referenced foreigners "typically from Asia, with PhDs" replacing Sydney residents.

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Also this morning, the ABC's election analyst Antony Green has explained why voting in NSW slightly different to the federal system.

Ring could be key in cold case

Roxlyn Margaret Bowie went missing from her Walgett home in 1982. ( Supplied )

Detectives investigating the cold case of Roxlyn Bowie, a mother-of-two who disappeared in 1982, will today explain how a diamond ring could be a critical piece of evidence in solving the matter.

While police suspect the 31-year-old was murdered, her body has never been found.

They've now revealed a diamond ring believed to have belonged to Ms Bowie was bought from a Bankstown pawn shop two years after she vanished.

Last year, an intense search was launched of a property in Walgett, northern NSW, including ground-penetrating radar technology.

A $1 million reward for information on Ms Bowie's suspected death remains on offer.

Power outage

The power outage affected 31,000 homes. ( Supplied: Ausgrid )

Around 31,000 people were without power on the Northern Beaches last night.

Ausgrid said the outage stretched from North Narrabeen to Palm Beach and included Terrey Hills.

Several sets of traffic lights were blacked out, sparking large queues on the roads.

It restored power to all homes by 7pm and Ausgrid is still investigating the cause of the incident.

Mystery bones discovered

Kazan Brown with her daughter Taylor at Gungalook Waterhole. ( Photo: Ross Byrne )

A traditional owner says the State Government has failed to investigate the discovery of bone in a "known burial ground" in the Warragamba Dam area.

A bone was found during heritage surveys conducted last year as part of preparations for the raising of the Warragamba Dam wall.

Gundungurra woman Kazan Brown says the bone was found in an area called "Big Flat" and needs to be properly investigated.

A spokesperson for Infrastructure NSW which is coordinating the project, says registered aboriginal parties were there during the surveys of the land.