NSW police search for missing children who failed to return from a walk

A search was under way in the central west of New South Wales on Tuesday morning for two children, aged 12 and 14, who went for a walk and failed to return.

Emergency services were called about 5.45pm on Monday to a property in Kains Flat, about 35km north-east of Mudgee, after reports two children were missing.

Eli Jones, 14, is about 175cm tall with brown hair and was last seen wearing a grey T-shirt. His sister Hannah, 12, is about 160cm tall with brown hair and was believed to be wearing a pink top.

They set off on a walk about 2.30pm but did not return, police were told.

Specialist officers from Police Rescue and the dog unit were called in to help search for the pair, alongside paramedics, Rural Fire Service volunteers, the Westpac rescue helicopter and other volunteers.