02/07/2017 12:57 PM AEST | Updated 02/07/2017 12:59 PM AEST

Police Issue Plea In Desperate Search For Sydney Man Missing With His Kids

Police are asking the public for help.

Neville Brown has gone missing with his children in Sydney.
Supplied: NSW Police
Neville Brown has gone missing with his children in Sydney.

Police have fears for a man and his two children who have gone missing in Sydney.

Neville Brown, 49, left a South Wentworthville address with his 10-year-old daughter and 12-year-old son at about 6.30pm on Saturday, police believe.

Concerned for Brown and his children, police on Sunday issued a plea for the public's assistance.

Officers "from Holroyd Local Area Command have conducted extensive searches of nearby streets and suburbs but without success," police said in a statement.

"Investigators have visited numerous addresses overnight that Mr Brown is known to frequent, but the family have not been sighted."

Police think the trio are travelling in a white Holden statesman with a NSW registration of CM 84 JM.

Brown is described as caucasian, between 170cm and 180cm tall, with a medium build, grey hair and blue eyes.

Authorities are urging anyone who spots the family group to contact triple-zero.