The search for Strabane woman Attracta Harron, who went missing ten weeks ago, has been stepped up, with specially trained dogs brought in from Yorkshire, England.
Ms Harron, a 65-year-old retired librarian, went missing as she walked to her home in Strabane having attended morning Mass across the border in Lifford.
The PSNI is now concentrating its efforts on an area outside the town known as Strabane Glen, using specialist equipment and two search dogs brought in from Yorkshire.
.
