A post on PSNI Facebook describes Helena as 5ft 4ins tall, of a medium build, with short hair. They add that she is possibly wearing a maroon coloured cardigan or a long brown dress.Helena was last seen in the Draperstown area around 9.30am yesterday - "and was heading towards Derry/Londonderry". The post adds: "She may be in the Derry/Londonderry, Limavady or Magherafelt area."Police are asking anyone with information regarding the whereabouts of Helena to contact us immediately on 101 quoting serial 771 of today’s date."