CONCERNS are held for two Northern Rivers' residents who have been reported missing in the past two weeks.
Lismore woman Ellen Wilson was reported missing on September 11 and has not been seen or heard from since.
Police from the Richmond Local Area Command are now appealing for any information from the public to help track down the missing 54-year-old who was last seen walking along Woodlark St at about 10.45am on September 11.
Inspector Mark Minehan said Ms Wilson's disappearance had been described as "out of character".
"There are concerns because she hasn't been seen," he said.
"She hasn't returned to her house.
"We're just trying to ascertain if there is some way of telling if she is in a location other than around Lismore so we can make contact with her."
Ms Wilson is described as being of Caucasian appearance, with light brown hair, brown eyes and a medium build. She also wears glasses.
A NSW Police statement said Ms Wilson may be driving a silver Subaru Forrester with the NSW registration plates CB76QX.
She is known to frequent Sydney and the Far North Coast.
Northern Rivers police are also searching for a 43-year-old Murwillumbah man who was last seen about midday on Monday, September 21.
John Willett is described as Caucasian, between 185-190cm tall, thin build, with brown hair and brown eyes.
Police from Tweed/Byron Local Area Command launched an investigation into his disappearance, but have so far been unsuccessful.
Insp. Minehan said there could be multiple reasons behind a missing persons report being made.
"They can vary from relationship break downs, some people just want to disappear and unfortunately in some circumstances there can be foul play," he said. "It's about knowing the circumstances, where the person is and in what circumstances she did go missing."
Mr Willett's dark green Holden Rodeo utility with NSW registration plates CD06XB is also missing.
Investigators are appealing for anyone with information about the whereabouts of either Ellen Wilson or John Willett to contact Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: http://www.nsw.crimestoppers.com.au/.
People can also contact the Lismore or Tweed Heads police stations.
The different categories of missing persons
There are generally four reasons for someone being reported missing:
Lost Person - this is a person who is temporarily disorientated and wishes to be found (e.g, someone who has been out walking in the countryside, taken a wrong turn and no longer knows where they are).
Missing Person who is voluntarily missing - this is someone who has control over their actions and who has decided upon a course of action (e.g., wishes to leave home, unauthorised absence from a care home, or to commit suicide).
Missing Person who may be under the influence of a third party - someone who is missing against their will (e.g. possible abduction, or murder victim).
Missing Person due to accident, injury or illness - examples are someone who has met with a sudden illness such as a stroke, someone wandering off due to a mental condition such as dementia, or struck by a 'hit and run' vehicle and now lying in a ditch.