Police want residents in the NSW towns of Katoomba and Mullumbimby to watch out for a missing father and daughter who may be in either area.
A new image of Greg Hutchings, 35, has also been released in a bid to locate him and his four-year-old daughter Eeva.
The search continued on Thursday for the pair who have not been seen since leaving the home of Mr Hutchings' mother at Pottsville in northern NSW on Saturday.
Mr Hutchings had arranged to meet his former partner and Eeva's mother in Pottsville at midday but he never appeared.
There have been no confirmed sightings of father and daughter, police say.
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But inquiries have led investigators to two possible areas the pair might be - at Katoomba in the Blue Mountains and Mullumbimby near Byron Bay.
Police are appealing for members of these communities to keep a look-out for the pair and to contact Crime Stoppers if they are sighted.
A new image of Mr Hutchings was released on Thursday.
He is of Caucasian appearance, about 175cm tall, with short brown curly hair and of a thin build.
Police say he was last seen wearing a black long-sleeve shirt, grey trousers and carrying a black backpack.
Eeva is also of Caucasian appearance, with long blonde hair and blue eyes.
She was last seen wearing an oversized blue and white-coloured shirt and multi-coloured board shorts.
Police are urging anyone with information about this incident to call Crime Stoppers on 1800 333 000.
